CN106303585A - Program look back method, media server, Set Top Box and program look back system - Google Patents

Abstract

The invention discloses a kind of program look back method, media server, Set Top Box and program look back system, belong to networking technology area.Described method includes: what media server receiving set up box sent reviews request, and this is reviewed request and includes intending reviewing the event identifier of program；This media server is reviewed the event identifier of program according to this plan and is obtained and review this plan corresponding to the event identifier of program with this plan and review the media slicing of program；This plan is reviewed the media slicing of program and is sent to this Set Top Box and is used for playing by this media server.It is to review the event identifier of program according to this plan to determine owing to intending reviewing the media slicing of program, this event identifier is that the accuracy rate of the media slicing therefore reviewing program according to plan determined by this event identifier is higher for unique mark program in EIT information entrained in the Media Stream of programme televised live.The present invention is used for reviewing program.

Description

Program playback method, media server, set-top box and program playback system

technical field

The invention relates to the field of network technology, in particular to a program review method, a media server, a set-top box and a program review system.

Background technique

Electronic Program Guide (EPG for short) is a TV program navigation system. The EPG server may store relevant information of TV programs, such as program title, program start time, program duration and content outline, etc. In a digital television system, a set-top box (Set Top Box; STB for short) and the EPG server can interact through a preset network protocol, so as to provide users with services such as program retrieval, program playback, or video-on-demand.

In related technologies, when a user needs to watch a certain program, the set-top box can obtain the start time of the program from the EPG server according to the user's request, and then request the video stream from the media server according to the start time returned by the EPG server, and the media server Video streams after the start time may be returned to the set-top box according to the start time.

However, the relevant information of the TV program stored in the EPG server is pre-configured, and for some programs (such as sports events) whose duration is not fixed, the actual broadcast time of the program may be different from the start time stored in the EPG server. When the user looks back at this type of program, the accuracy of the video stream returned by the media server according to the start time determined by the EPG server is relatively low.

Contents of the invention

In order to solve the problem in the related art that the accuracy of the video stream returned by the media server according to the start time determined by the EPG server is low, the present invention provides a program review method, a media server, a set-top box and a program review system. Described technical scheme is as follows:

In the first aspect, a method for viewing a program is provided. In this method, the media server can receive a viewing request sent by a set-top box, and the request includes an event identifier of a program to be viewed. Afterwards, the media server can according to the The event identifier of the program to be watched back obtains the media fragment of the program to be watched back corresponding to the event identifier of the program to be watched back, and sends the media fragment of the program to be watched back to the set-top box for playback, wherein the The event identifier can uniquely identify the program to be watched back.

Since the event identifier is the information used to uniquely identify the program obtained from the EIT information carried by the media stream of the live program, and the EIT information can be updated in real time according to the actual broadcasting situation of the program, therefore, the media server uses the EIT information to The accuracy rate of the media segment of the program to be watched back determined by the event identifier in is relatively high.

Optionally, the media server may store the correspondence between the event identifier of the program and the media segment of the program; or, the media server may also store the correspondence between the event identifier of the program and the key frame of the program, wherein , the key frame can be an I frame.

Optionally, when the media server stores the corresponding relationship between the event identifier of the program and the key frame of the program, the media server obtains the event identifier corresponding to the program to be viewed according to the event identifier of the program to be viewed The media segment of the program to be watched back may specifically include: the media server obtains the key frame corresponding to the event ID of the program to be watched back from the stored correspondence between the event ID of the program and the key frame of the program, according to The key frame obtains the media segment where the key frame is located, and the media segment where the key frame is located is the media segment of the program to be watched back.

Optionally, before the media server receives the look-back request sent by the set-top box, during the process of recording the program, the media server can monitor the event information table (Event Information Table; EIT) information in the media stream of the program. Including the event identifier; when the event identifier in the EIT information changes, obtain the current key frame in the media stream of the program, and record the corresponding relationship between the changed event identifier and the current key frame in the media stream. Wherein, the key frame obtained by the media server can be the current I frame in the media stream, if the current key frame in the media stream is not an I frame, then the media server can wait and obtain the I frame that appears for the first time after the event identifier changes .

Since the change of the event identifier indicates that the program in the program media stream has changed, the I frame obtained by the media server at this time is the first I frame of the program indicated by the changed event identifier, and the media server records the change According to the corresponding relationship between the final event identifier and the I frame, the starting position of the program indicated by each event identifier can be accurately located according to the I frame, thus improving the accuracy of the media stream of the program to be watched back by the media server .

Optionally, before the media server receives the look-back request sent by the set-top box, the media server monitors the event information table EIT information in the media stream of the program during the process of recording the program, and the EIT information includes the event identifier; when the EIT When the event identifier in the information changes, obtain the current key frame in the media stream of the program, for example, obtain the current I frame in the media stream; obtain the media segment where the key frame is located according to the key frame; and record the change The corresponding relationship between the subsequent event identifier and the media segment.

The current key frame in the media stream of the program acquired by the media server is the first I frame of the program indicated by the changed event identifier, so the media segment where the key frame is located is the first I frame of the program indicated by the changed event identifier. For the first media segment of the indicated program, the media server records the corresponding relationship between the changed event identifier and the media segment, and can accurately locate the starting position of the program indicated by each event identifier according to the media segment. Improve the accuracy of the media stream of the program to be watched back returned by the media server.

Optionally, when the event identifier in the EIT information changes, the key frame acquired by the media server is the first I frame of the program indicated by the changed event identifier.

Optionally, the watch-back request sent by the set-top box may also include: the start time of the program to be watched back, and when the media server stores the correspondence between the event identifier of the program and the media segment of the program, the method It may also include: judging whether the media fragment corresponding to the event identifier of the program to be watched back is recorded in the correspondence between the event identifier of the program stored in the media server and the media fragment of the program; When the event identifier of the program to be viewed back corresponds to the media segment, the media segment corresponding to the start time of the program to be viewed back is sent to the set-top box.

Optionally, the watch-back request sent by the set-top box may also include: the start time of the program to be watched back, and when the media server stores the correspondence between the event identifier of the program and the key frame of the program, the method further includes : Judging whether the key frame corresponding to the event identifier of the program to be watched back is recorded in the corresponding relationship between the event identifier of the program stored in the media server and the key frame of the program; when the program to be watched back is not recorded in the corresponding relationship When the corresponding key frame is identified by the event, the media segment corresponding to the start time of the program to be watched back is sent to the set-top box.

When the key frame or media segment corresponding to the event identifier of the program to be viewed back is not recorded in the corresponding relationship stored in the media server, the media server can also return the media segment corresponding to the start time of the program to be viewed back to the set-top box , so as to ensure the stability and reliability when the media server returns the media segment of the program to be watched back to the set-top box.

In the second aspect, a method for looking back at a program is provided. In this method, a set-top box can send a look-back request to a media server, and the look-back request includes an event identifier of a program to be watched back; The media segment of the program to be watched returned by the event identifier of the program to be watched back is played.

Since the event identifier is obtained from the EIT information carried by the media stream of the live program and used to uniquely identify the program, and the EIT information can be updated in real time according to the actual broadcasting of the program, according to the event in the EIT information The accuracy rate of identifying the determined media segment of the program to be watched back is relatively high.

Optionally, before the set-top box sends the look-back request to the media server, it can also receive the media stream of the live program sent by the media server, and save the event information table EIT information in the media stream of the live program, in the EIT information Include the event ID of the live program. Therefore, when the user needs to watch a program, the set-top box can send a watch-back request to the media server according to the stored event identifier of the program to be watched back.

Optionally, the EIT information may also include: the start time of the live program. Therefore, the playback request sent by the set-top box to the media server may also include the start time of the program to be viewed.

When the key frame or media segment corresponding to the event identifier of the program to be watched back is not recorded in the corresponding relationship stored in the media server, the media server can also return the program to the set-top box according to the start time of the program to be watched back. The media segment corresponding to the start time of watching the program ensures the stability and reliability when the media server returns the media segment of the program to be watched back to the set-top box.

In a third aspect, a media server is provided, and the media server includes: a receiving module, configured to receive a review request sent by a set-top box, and the review request includes an event identifier of a program to be viewed; a first obtaining module, configured to Obtain the media segment of the program to be viewed back corresponding to the event identification of the program to be viewed back according to the event identification of the program to be viewed back; the first sending module is used to send the media segment of the program to be viewed back to This set-top box is used for playback. The media server can be used to implement the program review method described in the first aspect.

In a fourth aspect, a set-top box is provided, and the set-top box includes: a sending module, configured to send a playback request to a media server, and the playback request includes an event identifier of a program to be viewed; a first receiving module, configured to receive the The media server plays the media segment of the program to be watched back according to the event identifier of the program to be watched back. The set-top box can be used to implement the program review method described in the second aspect.

In a fifth aspect, another media server is provided, and the media server may include: a processor, a memory, and a bus; the bus is used to connect the processor and the memory, the processor is used to execute the program stored in the memory, the The program may include the method described in the first aspect.

In a sixth aspect, a computer storage medium is provided for storing computer software instructions used by the above-mentioned media server, which includes a program designed for the media server to execute the above-mentioned aspect.

In a seventh aspect, another set-top box is provided, and the set-top box may include: a processor, a memory, and a bus; the bus is used to connect the processor and the memory, and the processor is used to execute a program stored in the memory, and the program can Including the method described in the second aspect.

In an eighth aspect, a computer storage medium is provided for storing computer software instructions for the above-mentioned set-top box, which includes a program designed for the set-top box to execute the above-mentioned aspect.

A ninth aspect provides a program review system, which may include: the media server described in the third aspect or the fifth aspect, and the set-top box described in the fourth aspect or the sixth aspect.

The beneficial effects brought by the technical solution provided by the embodiments of the present invention are:

To sum up, the embodiment of the present invention provides a program review method, a media server, a set-top box, and a program review system. , and send the media fragment of the program to be watched back to the set-top box, because the event identifier is the information used to uniquely identify the program obtained from the EIT information carried in the media stream of the live program, and the EIT The information can be updated in real time according to the actual broadcasting situation of the program, so the accuracy rate of the media segment of the program to be watched back determined according to the event identifier in the EIT information is relatively high.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

FIG. 1 is a schematic structural diagram of a program review system provided by an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a media server provided by an embodiment of the present invention;

Fig. 3 is a schematic structural diagram of a set-top box provided by an embodiment of the present invention;

Fig. 4 is a flow chart of a program review method provided by an embodiment of the present invention;

Fig. 5 is a flow chart of another program review method provided by an embodiment of the present invention;

Fig. 6-1 is a flow chart of another program review method provided by the embodiment of the present invention;

Fig. 6-2 is a schematic diagram of a program media stream provided by an embodiment of the present invention;

FIG. 7-1 is a schematic structural diagram of another media server provided by an embodiment of the present invention;

FIG. 7-2 is a schematic structural diagram of another media server provided by an embodiment of the present invention;

FIG. 7-3 is a schematic structural diagram of another media server provided by an embodiment of the present invention;

Fig. 8-1 is a schematic structural diagram of another set-top box provided by an embodiment of the present invention;

Fig. 8-2 is a schematic structural diagram of another set-top box provided by an embodiment of the present invention.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Fig. 1 is a schematic structural diagram of a program review system provided by an embodiment of the present invention, as shown in Fig. A server cluster composed of several servers, or a cloud computing service center. The media server 10 and the set-top box 20 can be connected through a wired network or a wireless network. The media server 10 is used to provide the set-top box 20 with a media stream of a live program or a program watched back. Specifically, the media server 10 can transcode the media stream into multiple codes based on HTTP Adaptive Streaming (HAS) technology. Then the content of each code rate is cut into pieces, and the cut media pieces are sent to the set-top box, and the set-top box 20 is used to receive the media pieces and play the media through display devices such as TV Fragmentation.

FIG. 2 is a schematic structural diagram of a media server provided by an embodiment of the present invention. As shown in FIG. At least one communication bus 204 is used to realize connection communication between these devices. The processor 201 is used to execute executable modules, such as computer programs, stored in the memory 203 . The memory 203 may include a high-speed random access memory (RAM: Random Access Memory), and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory. Through at least one network interface 202 (which may be wired or wireless), the communication connection between the identification device of the network equipment in the data center network and at least one other network element can be realized, and Internet, wide area network, local network, metropolitan area network, etc. can be used. In some implementations, the memory 203 stores a program 2031, and the processor 201 can execute the program 2031 to implement the following method for watching a program:

Receive the review request sent by the set-top box, the review request includes the event identifier of the program to be viewed;

Obtaining the media segment of the program to be watched back corresponding to the event ID of the program to be watched back according to the event identifier of the program to be watched back;

The media segment of the program to be watched back is sent to the set-top box for playing.

Optionally, the media server stores the correspondence between the event identifier of the program and the media segment of the program; or, stores the correspondence between the event identifier of the program and the key frame of the program.

When the media server stores the corresponding relationship between the event identifier of the program and the key frame of the program, the media server acquires the media of the program to be viewed corresponding to the event identifier of the program to be viewed according to the event identifier of the program to be viewed. Fragmentation can specifically include:

From the stored correspondence between the event ID of the program and the key frame of the program, the key frame corresponding to the event ID of the program to be watched is obtained, and the media segment where the key frame is located is obtained according to the key frame.

Optionally, before receiving the review request sent by the top box, the method further includes:

In the process of recording a program, monitor the event information table EIT information in the media stream of the program, and the EIT information includes an event identifier;

When the event identifier in the EIT information changes, obtain the current key frame in the media stream of the program;

The corresponding relationship between the changed event identifier and the current key frame in the media stream is recorded.

Optionally, before receiving the review request sent by the top box, the method further includes:

In the process of recording a program, monitor the event information table EIT information in the media stream of the program, and the EIT information includes an event identifier;

When the event identifier in the EIT information changes, obtain the current key frame in the media stream of the program;

Obtain the media segment where the key frame is located according to the key frame;

The corresponding relationship between the changed event identifier and the media segment is recorded.

Optionally, the key frame is the first I frame of the program indicated by the changed event identifier.

Optionally, the watchback request also includes: the start time of the program to be watched back, and the method also includes:

Judging whether the media fragment corresponding to the event identifier of the program to be watched back is recorded in the correspondence between the event identifier of the program stored in the media server and the media fragment of the program;

When the media segment corresponding to the event identifier of the program to be viewed back is not recorded in the correspondence, the media segment corresponding to the start time of the program to be viewed back is sent to the set-top box.

Optionally, the watchback request also includes: the start time of the program to be watched back, and the method also includes:

Judging whether the keyframe corresponding to the event identifier of the program to be watched back is recorded in the corresponding relationship between the event identifier of the program stored in the media server and the key frame of the program;

When the key frame corresponding to the event identifier of the program to be watched back is not recorded in the correspondence, the media segment corresponding to the start time of the program to be watched back is sent to the set-top box.

To sum up, the embodiment of the present invention provides a media server, the media server can obtain the media segment of the program to be watched back according to the event identifier of the program to be watched back sent by the set-top box, and send the program to be watched back to the set-top box Looking back at the media segment of the program, since the event identifier is obtained from the EIT information carried by the media stream of the live program to uniquely identify the program, and the EIT information can be updated in real time according to the actual broadcasting of the program, Therefore, the accuracy rate of the media segment of the program to be watched back determined according to the event identifier in the EIT information is relatively high.

Fig. 3 is a schematic structural diagram of a set-top box provided by an embodiment of the present invention. As shown in Fig. 3 , the set-top box may include at least one processor 301 (such as a CPU), at least one network interface 302 or other communication interfaces, a memory 303 and at least one A communication bus 304 is used to implement connection communication between these devices. The processor 301 is used to execute executable modules, such as computer programs, stored in the memory 303 . The memory 303 may include a high-speed random access memory (RAM: Random Access Memory), and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory. Through at least one network interface 302 (which can be wired or wireless), the communication connection between the identification device of the network equipment in the data center network and at least one other network element can be realized, and Internet, wide area network, local network, metropolitan area network, etc. can be used. In some implementations, the memory 303 stores a program 3031, and the processor 301 can execute the program 3031 to implement the following method for watching a program:

Send a look-back request to the media server, the look-back request includes the event identifier of the program to be watched back;

Receiving and playing the media segment of the program to be watched back returned by the media server according to the event identifier of the program to be watched back.

Optionally, before sending the look-back request to the media server, the method further includes:

Receive the media stream of the live program sent by the media server;

Save the event information table EIT information in the media stream of the live program, the EIT information includes the event identifier of the live program, and the live program and the program to be watched back are the same program.

Optionally, the EIT information also includes: the start time of the live program; the review request also includes the start time of the program to be viewed.

To sum up, the embodiment of the present invention provides a set-top box, and the watch-back request sent by the set-top box to the media server includes the event identifier of the program to be watched back, so that the media server can obtain the program to be watched back according to the event identifier Since the event identifier is obtained from the EIT information carried by the media stream of the live program and used to uniquely identify the program, and the EIT information can be updated in real time according to the actual broadcasting of the program, the media server The accuracy rate of the media segment of the program to be watched back determined according to the event identifier in the EIT information is relatively high.

Fig. 4 is a flow chart of a program review method provided by an embodiment of the present invention, the method can be applied to the media server 10 of the system shown in Fig. 1, as shown in Fig. 4, the method includes:

Step 401, the media server receives a review request sent by the set-top box, and the review request includes the event identifier of the program to be reviewed.

Step 402, the media server obtains, according to the event identifier of the program to be viewed back, the media segment of the program to be viewed back corresponding to the event identifier of the program to be viewed back.

Step 403, the media server sends the media segment of the program to be watched back to the set-top box for playing.

To sum up, the embodiment of the present invention provides a program playback method, the media server can obtain the media segment of the program to be watched according to the event identifier of the program to be watched back sent by the set-top box, and send the program to the set-top box The media segment of the program to be reviewed, because the event identifier is obtained from the EIT information carried by the media stream of the live program to uniquely identify the program, and the EIT information can be updated in real time according to the actual broadcasting situation of the program , so the accuracy of the media segment of the program to be watched back determined according to the event identifier in the EIT information is relatively high.

Fig. 5 is a flow chart of another program review method provided by an embodiment of the present invention. This method can be applied to the set-top box 20 of the system shown in Fig. 1. As shown in Fig. 5, the method includes:

Step 501, the set-top box sends a review request to the media server, and the review request includes an event identifier of the program to be reviewed.

Step 502: The set-top box receives and plays the media segment of the program to be watched back which is returned by the media server according to the event identifier of the program to be watched back.

To sum up, the embodiment of the present invention provides a method for viewing a program. The playback request sent by the set-top box to the media server includes the event identifier of the program to be viewed, so that the media server can obtain the program to be viewed according to the event identifier. Watch the media segment of the program, because the event identifier is the information used to uniquely identify the program obtained from the EIT information carried by the media stream of the live program, and the EIT information can be updated in real time according to the actual broadcasting situation of the program, so The accuracy rate of the media segment of the program to be watched back determined according to the event identifier in the EIT information is relatively high.

Fig. 6-1 is a flow chart of another program review method provided by the embodiment of the present invention. This method can be applied to the system shown in Fig. 1. As shown in Fig. 6-1, the method includes:

Step 601, the media server sends the media stream of the live program to the set-top box.

In the embodiment of the present invention, when the user needs to watch a live program, the set-top box can send a live broadcast request to the media server according to the viewing request triggered by the user, and the media server can return the media stream of the live program to the set-top box according to the live broadcast request, so that the Set-top box playback. Wherein, the media stream of the live broadcast program sent by the media server may be obtained from an encoder, which is used to encode the analog signal of the source media stream to convert it into a digital signal, and the encoder is in the process of encoding , the EIT information can be written into the media stream, therefore, the media stream of the live program sent by the media server to the set-top box also carries the EIT information.

The EIT information is a table in the service information in the digital broadcast television, and the EIT information is a further description of the programs of a certain channel stream. The EIT information may include various program information such as event ID, program name, program start time, program duration, parental control information, black screen control information, program version information, and program status information. It should be noted that, in practical applications, the EIT information may be edited and generated by the staff based on the actually played media stream. Therefore, compared with the pre-configured program information in the EPG server, the program information in the EIT information is more accurate.

Step 602, the STB saves the EIT information in the media stream of the live program.

After receiving the media stream of the live program sent by the media server, the set-top box can play the media stream of the live program through a display device such as a TV. At the same time, the set-top box can also store the EIT information in the media stream of the live program. Specifically, since in a digital television system, a set-top box can establish a communication connection with an EPG server through a preset network protocol, the set-top box can obtain an EPG template from the EPG server each time it is turned on. During the process of playing the media stream of the live program, the set-top box can monitor the EIT information carried in the media stream. When any information in the EIT information (such as event identification, program start time or program duration, etc.) changes , the changed EIT information can be saved in the cache through the EPG template.

For example, assuming that the set-top box broadcasts the NBA finals and the European Cup group match successively from 8:00 to 13:30 in the morning, the EIT information in the media stream of the live program saved by the set-top box can be as shown in Table 1, from the table 1, it can be seen that the event identifier of the live broadcast program "NBA Finals" is A, the program start time is 8:00, and the program duration is 3 hours.

Table 1

event ID Program Title program start time Program duration (hours) A NBA Finals 8:00 3 B European Cup group stage 11:00 2.5

Step 603, the media server monitors the EIT information in the media stream of the program during the process of recording the program.

In the embodiment of the present invention, in order to ensure that the media server can provide the user with the function of watching back the program, the media server can also synchronously record the media stream of the live program during the process of sending the media stream of the live program to the set-top box, and The EIT information carried in the media stream is analyzed and monitored.

Step 604, when the event identifier in the EIT information changes, obtain the current key frame in the media stream of the program.

The EIT information may include various program information such as event identification, program name and program start time, and the media server may monitor the event identification in the EIT information, and when the event identification changes, obtain the current program information in the media stream of the program. The key frame of , for example, the key frame may be an I frame. Since the change of the event identifier indicates that the program in the program media stream has changed, the I frame acquired by the media server at this time may be the first I frame of the program indicated by the changed event identifier. If the event identifier in the EIT information changes and the current key frame in the media stream is not an I frame, the media server may wait for and obtain the I frame that appears for the first time after the event identifier changes.

As an example, Fig. 6-2 is a schematic diagram of a program media stream provided by an embodiment of the present invention. As shown in Fig. 6-2, it is assumed that the media server is sending the media stream of the live program to the set-top box and recording the media stream of the live program During the process, if it is detected at 11:00 that the event identifier in the media stream changes from A to B, then the media server can obtain the current key frame in the media stream, such as an I frame. If the current key frame in the media stream is not an I frame, the media server can wait and obtain the first I frame after 11:00, as shown in Figure 6-2, the I frame obtained by the media server can be: I frame b.

It should be noted that, in addition to the event identifier, the EIT information carried in the media stream may also include various program information such as program name and program start time. It can also be seen from Figure 6-2 that when the EIT information changes, it is also possible that the program has not changed, but the level or name of the program has changed, as shown in the EIT information change points x1 and x2 in the figure below, or it may be a switch A new program, such as the EIT change point x3 in the figure below. Since the event identifier in the EIT information can uniquely identify a program, when the event identifier in the EIT information changes, the media server can accurately determine that the program in the media stream has changed, that is, a new program has started, Therefore, the accuracy of determining program update according to the change of the event identifier is relatively high.

Step 605, the media server records the correspondence between the changed event identifier and the current key frame in the media stream.

In the embodiment of the present invention, for the convenience of recording, when the media server detects that the event identifier changes, it can obtain the index value of the current key frame in the media stream, and record the changed event identifier and the event identifier in the corresponding relationship. Correspondence between the index values of the current keyframe. Since the change of the event identifier in the EIT information can accurately reflect the change of the program in the media stream, after the media server records the corresponding relationship between the changed event identifier and the current key frame in the media stream, it can Corresponding relationship, accurately determine the start frame of the program indicated by each event identifier.

Exemplarily, in the embodiment of the present invention, the corresponding relationship between the event identifier of the program recorded in the media server and the key frame of the program can be as shown in Table 2, wherein, the key frame corresponding to the event identifier A is I frame a, The key frame corresponding to event identifier B is I frame b.

Table 2

event ID Keyframe A I frame a B I frame b

Step 606, the set-top box sends a review request to the media server, and the review request includes an event identifier of the program to be reviewed.

In the embodiment of the present invention, when the set-top box is playing a live program, if the user wants to watch a program that has been played from the beginning, the set-top box can send a playback request to the media server according to the trigger operation of the user. The watch request includes the event identifier of the program to be watched back. For example, assuming that at 12:00, the set-top box is playing the European Cup group match, and the user wishes to watch the European Cup group match from the beginning, the set-top box may include the intended Look back at the program: The event logo of the European Cup group match: B.

In practical applications, the look-back request sent by the set-top box to the media server may be a Real Time Streaming Protocol PLAY (RTSP PLAY) request, and the RTSP PLAY request may carry the start time of the program to be watched , can also carry the x-Event_ID extension field, the event identifier of the program to be watched back is recorded in the x-Event_ID extension field, the pseudocode of the RTSP PLAY is as follows:

PLAYURL

Range:clock=$timestamp;

x-Event_ID:$eventId.

Wherein, timestamp is the start time of the program to be watched back, and eventId is the event identifier of the program to be watched back.

Step 607 , the media server judges whether the key frame corresponding to the event identifier of the program to be watched back is recorded in the stored correspondence between the event identifier of the program and the key frame of the program.

When the key frame corresponding to the event identifier of the program to be watched back is recorded in the correspondence, step 608 is performed; when the key frame corresponding to the event identifier of the program to be watched back is not recorded in the correspondence, step 609 is performed.

Step 608 , the media server acquires the media segment of the program to be watched corresponding to the event identifier of the program to be watched back according to the event identifier of the program to be watched back. Execute step 610.

After the media server receives the look-back request sent by the set-top box, it can first judge whether the key frame corresponding to the event identifier of the program to be watched is recorded in the corresponding relationship between the event identifier of the stored program and the key frame of the program. When the key frame corresponding to the event identifier of the program to be watched back is recorded in the corresponding relationship, the media server may acquire the key frame corresponding to the event ID of the program to be watched back. Further, since the media server sends the media stream to the set-top box in the form of media fragments, the media server can also obtain the media fragment where the key frame is located according to the key frame.

For example, assume that the corresponding relationship stored in the media server is as shown in table 2, since the key frame corresponding to the event identification B is recorded in the table 2, the media server can obtain the key frame corresponding to the event identification B: I frame b. Further, the media server can also obtain the key frame: the media segment where the I frame b is located from the recorded media stream.

In the related art, for programs such as sports events and other programs whose duration is not fixed, the accuracy of the start time of the pre-stored programs in the EPG server is relatively low. If you want to watch the beginning of the European Cup group match with one click, the set-top box can use the pre-stored program information in the EPG server: NBA Finals 8:00-11:00; European Cup group match 11:00-13: 00, request the media server to obtain the media stream recorded from 11:00 for playback, but because the actual broadcast time of the NBA Finals was extended to 11:20 due to overtime when the program was actually broadcast, therefore, At this time, the media stream obtained by the set-top box from the media server is still the NBA Finals, and the accuracy of the media server determining the media stream according to the start time is low, and the user experience is poor.

However, in the embodiment of the present invention, the media server can store the corresponding relationship between the event identifier of the program and the key frame of the program during the process of recording the media stream that is actually played. Since the EIT information is carried in the media stream that is actually played , and can be updated in real time according to the actual broadcasting situation of the program. For example, when the NBA Finals is extended to 11:20, the event identifier recorded in the EIT information also changes when the program is actually switched, and the EIT The start time of the European Cup group stage recorded in the information can also be updated to 11:20. Therefore, the EIT information can accurately record various information of the program, and the accuracy of the media segment of the program to be watched back determined by the media server according to the event identifier of the program to be watched back is relatively high, and it can accurately locate the program to be watched back for the user. The start position of the program improves the user experience.

Step 609, the media server obtains the media segment corresponding to the start time of the program to be watched back. Execute step 610.

In the embodiment of the present invention, the watchback request sent by the set-top box to the media server may also include the start time of the program to be watched back. When the media server receives the look-back request sent by the set-top box, if it is judged that the key frame corresponding to the event identifier of the program to be watched back is not recorded in the corresponding relationship between the event identifier of the stored program and the key frame of the program, The media server may also obtain, from the recorded media stream, the media segment corresponding to the start time of the program to be watched back. For example, the media segment of the media stream recorded after the start time may be obtained.

It should be noted that although the media server can also determine the media segment of the program to be watched back according to the start time in the EIT information, because the actual broadcast media stream is forwarded between the encoder, the media server and the set-top box There is a delay, so the media segment of the program to be watched back determined according to the start time in the EIT information also has a certain error.

For example, suppose that in the actual broadcast media stream, the start time of the European Cup group match is 11:00, and the start time of the European Cup group match recorded in the EIT information of the media stream is also 11:00, but because the encoder There is a 5-second delay in signal transmission with the media server, and the media server receives the media stream of the European Cup group match at 11:05 seconds. Therefore, if the set-top box starts at 11:00 according to the EIT information Request the media stream of the European Cup group match to the media server, then the media server will return the media stream recorded since 11:00 to the set-top box, which may be the media stream of other programs, so according to the EIT information Media fragmentation determined by start time is less accurate.

In addition, if the EIT information also includes parental control information (the parental control information can be used to record the restriction level of the program, such as suitable for viewing by all age groups, not suitable for viewing by minors under the age of 14 or unsuitable for minors under the age of 17 People watch, etc.), and the program recorded by the media server at 11:00 has a higher restriction level, then when the media server returns the media stream to the set-top box, the user may need to enter a password to watch it, resulting in poor user experience.

Step 610, the media server sends the media segment of the program to be watched back to the STB.

The media server obtains the media segment of the program to be viewed according to the corresponding relationship between the event identifier of the stored program and the key frame of the program, or obtains the media segment of the program to be viewed according to the start time of the program to be viewed After that, the media segment of the program to be watched back can be returned to the set-top box.

For example, the media server may return key frames to the set-top box: the media segment where the I frame b is located, and the media segment after the media segment where the I frame b is located. Since the I frame b is the current key frame in the media stream of the live program when the event identifier in the EIT information changes from A to B, the I frame b is the program indicated by the event identifier B: the European Cup group match For the first I frame, the starting position of the European Cup group stage can be accurately located according to the I frame b.

Step 611, the set-top box plays the media segment of the program to be watched back.

After the set-top box receives the media segment of the program to be watched back sent by the media server, it can replay the program to be watched back to the user through a display device such as a TV. Since the media segment of the program to be watched back sent by the media server is determined according to the event identifier of the program to be watched back, the accuracy of the media segment of the program to be watched back received and played by the set-top box is higher, and the user experience is better. it is good.

For example, the set-top box can start to play the European Cup group match from the media fragment where the I frame b is located. Since the I frame b is the program indicated by the event identifier B: the first I frame of the European cup group match, the set-top box is improved. The accuracy of the media segment of the program to be played back.

It should be noted that the order of the steps of the program review method provided by the embodiment of the present invention can be adjusted appropriately, and the steps can also be increased or decreased accordingly according to the situation. For example, step 603 and step 601 may be executed synchronously, and step 607 and step 609 may be deleted according to circumstances. Any person skilled in the art within the technical scope disclosed in the present invention can easily think of changing methods, which should be covered within the scope of protection of the present invention, and thus will not be repeated here.

In another embodiment of the present invention, in the above step 604, when the event identifier in the EIT information changes, after the media server acquires the current key frame in the media stream of the program, the media server can also frame, and further obtain the media fragment where the key frame is located, then in the above step 605, the media server can also record the correspondence between the changed event identifier and the media fragment, for example, the transformed event can be recorded The correspondence between the identifier and the index value of the media segment. That is, the media server may not only store the correspondence between the event identifier of the program and the key frame of the program, but also store the correspondence between the event identifier of the program and the media segment of the program.

Therefore, after the media server receives the look-back request sent by the set-top box, in the above step 607, the media server can also determine whether the event identifier of the stored program is recorded in the corresponding relationship between the program's media segment. The media segment corresponding to the event identifier of the playback program.

When the media segment corresponding to the event identifier of the program to be watched back is recorded in the corresponding relationship, the media server can directly obtain the media segment of the program to be watched back according to the corresponding relationship; When recording the media segment corresponding to the event identifier of the program to be viewed back, the media server may send the media segment corresponding to the start time of the program to be viewed back to the set-top box.

To sum up, the embodiment of the present invention provides a program playback method, the media server can obtain the media segment of the program to be watched according to the event identifier of the program to be watched back sent by the set-top box, and send the program to the set-top box The media segment of the program to be reviewed, because the event identifier is obtained from the EIT information carried by the media stream of the live program to uniquely identify the program, and the EIT information can be updated in real time according to the actual broadcasting situation of the program , so the accuracy of the media segment of the program to be watched back determined according to the event identifier in the EIT information is relatively high.

Figure 7-1 is a schematic structural diagram of a media server provided by an embodiment of the present invention. As shown in Figure 7-1, the media server may include:

The receiving module 701 is configured to receive the review request sent by the top box, and the review request includes the event identifier of the program to be reviewed.

The first acquiring module 702 is configured to acquire, according to the event identifier of the program to be watched back, the media segment of the program to be watched back corresponding to the event identifier of the program to be watched back.

The first sending module 703 is configured to send the media segment of the program to be watched back to the set-top box for playing.

To sum up, the embodiment of the present invention provides a media server, the media server can obtain the media segment of the program to be watched back according to the event identifier of the program to be watched back sent by the set-top box, and send the program to be watched back to the set-top box Looking back at the media segment of the program, since the event identifier is obtained from the EIT information carried by the media stream of the live program to uniquely identify the program, and the EIT information can be updated in real time according to the actual broadcasting of the program, Therefore, the accuracy rate of the media segment of the program to be watched back determined according to the event identifier in the EIT information is relatively high.

FIG. 7-2 is a schematic structural diagram of another media server provided by an embodiment of the present invention. The media server stores the correspondence between event identifiers of programs and media segments of the programs. As shown in Figure 7-2, the media server can include:

The receiving module 701 is configured to receive the review request sent by the top box, and the review request includes the event identifier of the program to be reviewed.

The first acquiring module 702 is configured to acquire, according to the event identifier of the program to be watched back, the media segment of the program to be watched back corresponding to the event identifier of the program to be watched back. For example, the first obtaining module 702 may be configured to execute the content indicated in the above step 608 .

The first sending module 703 is configured to send the media segment of the program to be watched back to the set-top box for playing. For example, the first sending module 703 may be configured to execute the content indicated in step 610 above.

The first monitoring module 704 is configured to monitor the event information table EIT information in the media stream of the program during the process of recording the program, and the EIT information includes the event identifier. For example, the first monitoring module 704 may be used to execute the content indicated in the above step 603 .

The second obtaining module 705 is configured to obtain the current key frame in the media stream of the program when the event identifier in the EIT information changes. For example, the second acquiring module 705 may be configured to execute the content indicated in the above step 604 .

The first recording module 706 is configured to record the corresponding relationship between the changed event identifier and the current key frame in the media stream. For example, the first recording module 706 may be used to execute the content indicated in the above step 605 .

The first judging module 707 is configured to judge whether the media segment corresponding to the event ID of the program to be watched is recorded in the correspondence between the event ID of the program stored in the media server and the media segment of the program. For example, the first judging module 707 may be configured to execute the content indicated in the above step 607.

The second sending module 708 is configured to send the media segment corresponding to the start time of the program to be watched back to the set-top box when the media segment corresponding to the event identifier of the program to be watched back is not recorded in the correspondence. For example, the second sending module 708 may be configured to execute the content indicated in step 610 above.

Optionally, the first acquiring module 702 is also used for:

From the stored correspondence between the event ID of the program and the key frame of the program, the key frame corresponding to the event ID of the program to be watched is obtained, and the media segment where the key frame is located is obtained according to the key frame.

FIG. 7-3 is a schematic structural diagram of another media server provided by an embodiment of the present invention. The media server stores the correspondence between event identifiers of programs and key frames of the programs. As shown in Figure 7-3, the media server can include:

The receiving module 701 is configured to receive the review request sent by the top box, and the review request includes the event identifier of the program to be reviewed.

The first acquiring module 702 is configured to acquire, according to the event identifier of the program to be watched back, the media segment of the program to be watched back corresponding to the event identifier of the program to be watched back.

The first sending module 703 is configured to send the media segment of the program to be watched back to the set-top box for playing.

The second monitoring module 709 is configured to monitor the event information table EIT information in the media stream of the program during the process of recording the program, and the EIT information includes the event identifier.

The third acquiring module 710 is configured to acquire the current key frame in the media stream of the program when the event identifier in the EIT information changes.

The fourth obtaining module 711 is configured to obtain the media segment where the key frame is located according to the key frame.

The second recording module 712 is configured to record the corresponding relationship between the changed event identifier and the media segment.

The review request also includes: the start time of the program to be viewed, and the device also includes:

The second judging module 713 is used to judge whether the key frame corresponding to the event logo of the program to be watched back is recorded in the corresponding relationship between the event logo of the program stored in the media server and the key frame of the program;

The third sending module 714 is configured to send the media segment corresponding to the start time of the program to be watched back to the set-top box when the key frame corresponding to the event identifier of the program to be watched back is not recorded in the corresponding relationship.

Optionally, the key frame is the first I frame of the program indicated by the changed event identifier.

To sum up, the embodiment of the present invention provides a media server, the media server can obtain the media segment of the program to be watched back according to the event identifier of the program to be watched back sent by the set-top box, and send the program to be watched back to the set-top box Looking back at the media segment of the program, since the event identifier is obtained from the EIT information carried by the media stream of the live program to uniquely identify the program, and the EIT information can be updated in real time according to the actual broadcasting of the program, Therefore, the accuracy rate of the media segment of the program to be watched back determined according to the event identifier in the EIT information is relatively high.

Fig. 8-1 is a schematic structural diagram of another set-top box provided by an embodiment of the present invention. As shown in Fig. 8-1, the set-top box may include:

The sending module 801 is configured to send a review request to the media server, and the review request includes an event identifier of the program to be reviewed.

The first receiving module 802 is configured to receive and play the media segment of the program to be watched back returned by the media server according to the event identifier of the program to be watched back.

To sum up, the embodiment of the present invention provides a set-top box. The media server can obtain the media fragment of the program to be watched back according to the event identifier of the program to be watched back sent by the set-top box, and send the program to be watched back to the set-top box. The media segment of the program, because the event identifier is the information used to uniquely identify the program obtained from the EIT information carried by the media stream of the live program, and the EIT information can be updated in real time according to the actual broadcasting situation of the program, so according to The accuracy rate of the media segment of the program to be watched back determined by the event identifier in the EIT information is relatively high.

Fig. 8-2 is a schematic structural diagram of another set-top box provided by an embodiment of the present invention. As shown in Fig. 8-2, the set-top box may include:

The sending module 801 is configured to send a review request to the media server, and the review request includes an event identifier of the program to be reviewed. For example, the sending module 801 may be configured to execute the content indicated in step 606 above.

The first receiving module 802 is configured to receive and play the media segment of the program to be watched back returned by the media server according to the event identifier of the program to be watched back.

The second receiving module 803 is configured to receive the media stream of the live program sent by the media server.

The saving module 804 is configured to save the event information table EIT information in the media stream of the live program, the EIT information includes the event identifier of the live program, and the live program and the program to be watched back are the same program. For example, the saving module 804 can be used to execute the content indicated in the above step 602 .

Optionally, the EIT information also includes: the start time of the live program;

The review request also includes the start time of the program to be viewed.

To sum up, the embodiment of the present invention provides a set-top box, and the watch-back request sent by the set-top box to the media server includes the event identifier of the program to be watched back, so that the media server can obtain the program to be watched back according to the event identifier media fragments, since the event identifier is obtained from the EIT information carried by the media stream of the live program to uniquely identify the program, and the EIT information can be updated in real time according to the actual broadcasting situation of the program, so according to the The accuracy rate of the media segment of the program to be watched back determined by the event identifier in the EIT information is relatively high.

Referring to FIG. 1 , an embodiment of the present invention provides a program review system, which may include: a media server 10 and a set-top box 20, wherein the media server 10 may be any As shown in the media server, the set-top box may be the set-top box shown in Fig. 4, Fig. 8-1 or Fig. 8-2.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of each module in the media server and the set-top box described above can refer to the corresponding process in the foregoing method embodiment, and will not be repeated here.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (25)

1. a program look back method, it is characterised in that described method includes:

What media server receiving set up box sent reviews request, described in review request and include intending reviewing the event mark of program Know；

Described media server is reviewed the event identifier of program according to described plan and is obtained and review the event identifier of program with described plan Corresponding described plan reviews the media slicing of program；

Described plan is reviewed the media slicing of program and is sent to described Set Top Box and is used for playing by described media server.

Method the most according to claim 1, it is characterised in that

Described media server storage has the corresponding relation of the event identifier of program and the media slicing of described program.

Method the most according to claim 1, it is characterised in that

Described media server storage has the corresponding relation of the event identifier of program and the key frame of described program.

Method the most according to claim 3, it is characterised in that described media server reviews the thing of program according to described plan Part mark obtains to be reviewed described plan corresponding to the event identifier of program and reviews the media slicing of program with described plan, including:

Described media server from the corresponding relation of the key frame of event identifier and the described program of the program of storage, obtain with Described plan reviews the key frame that the event identifier of program is corresponding, and the media obtaining described key frame place according to described key frame divide Sheet.

5. according to the method described in claim 1 or 3, it is characterised in that receiving set up box send review request before, institute Method of stating also includes:

During recording program, monitor the Event Information Table EIT information in the Media Stream of described program, described EIT information Include event identifier；

When the event identifier in described EIT information changes, obtain key frame current in the Media Stream of described program；

Record the corresponding relation between key frame current in the event identifier after change and described Media Stream.

Method the most according to claim 1 and 2, it is characterised in that receiving set up box send review request before, institute Method of stating also includes:

During recording program, monitor the Event Information Table EIT information in the Media Stream of described program, described EIT information Include event identifier；

When the event identifier in described EIT information changes, obtain key frame current in the Media Stream of described program；

The media slicing at described key frame place is obtained according to described key frame；

The corresponding relation between event identifier and described media slicing after record change.

7. according to the method described in claim 5 or 6, it is characterised in that

Described key frame is the first I frame of the program indicated by the event identifier after described change.

Method the most according to claim 2, it is characterised in that described in review in request and also include: intend reviewing opening of program Time beginning, described method also includes:

Judge in the corresponding relation of the event identifier of the program of storage in described media server and the media slicing of described program Record has described plan to review the media slicing that the event identifier of program is corresponding；

When described corresponding relation not recording described plan and reviewing media slicing corresponding to the event identifier of program, to described machine top Box sends reviews media slicing corresponding to time started of program with described plan.

Method the most according to claim 3, it is characterised in that described in review in request and also include: intend reviewing opening of program Time beginning, described method also includes:

Judge in described media server the event identifier of the program of storage and the corresponding relation of the key frame of described program are No record has described plan to review the key frame that the event identifier of program is corresponding；

When described corresponding relation not recording described plan and reviewing key frame corresponding to the event identifier of program, to described Set Top Box Send and review media slicing corresponding to time started of program with described plan.

10. a program look back method, it is characterised in that described method includes:

Set Top Box sends to media server and reviews request, described in review request and include intending reviewing the event identifier of program；

Described Set Top Box receives the described plan of the event identifier return that described media server reviews program according to described plan and reviews The media slicing of program plays out.

11. methods according to claim 10, it is characterised in that review request to media server transmission described Before, described method also includes:

Receive the Media Stream of the programme televised live that described media server sends；

Preserving the Event Information Table EIT information in the Media Stream of described programme televised live, described EIT information includes described live joint Purpose event identifier.

12. methods according to claim 11, it is characterised in that also include in described EIT information: described programme televised live Time started；

Described reviewing also includes in request that described plan reviews the time started of program.

13. 1 kinds of media servers, it is characterised in that described media server includes:

Receiver module, reviews request for what receiving set up box sent, described in review request and include intending reviewing the event of program Mark；

First acquisition module, the event mark of program is reviewed in the event identifier acquisition and described plan for reviewing program according to described plan Know corresponding described plan and review the media slicing of program；

First sending module, is sent to described Set Top Box is used for playing for described plan is reviewed the media slicing of program.

14. media servers according to claim 13, it is characterised in that

Described media server storage has the corresponding relation of the event identifier of program and the media slicing of described program.

15. media servers according to claim 13, it is characterised in that

Described media server storage has the corresponding relation of the event identifier of program and the key frame of described program.

16. media servers according to claim 15, it is characterised in that described first acquisition module, are additionally operable to:

From the event identifier of the program of storage with the corresponding relation of the key frame of described program, obtain and review program with described plan Key frame corresponding to event identifier, obtain the media slicing at described key frame place according to described key frame.

17. according to the media server described in claim 13 or 15, it is characterised in that described media server also includes:

First monitoring modular, for, during recording program, monitoring the Event Information Table EIT in the Media Stream of described program Information, described EIT information includes event identifier；

Second acquisition module, for when the event identifier in described EIT information changes, obtains the Media Stream of described program In current key frame；

First logging modle, be used between the key frame that the event identifier after recording change is current with described Media Stream is corresponding Relation.

18. according to the media server described in claim 13 or 14, it is characterised in that described media server also includes:

Second monitoring modular, for, during recording program, monitoring the Event Information Table EIT in the Media Stream of described program Information, described EIT information includes event identifier；

3rd acquisition module, for when the event identifier in described EIT information changes, reviews the matchmaker of program described in acquisition Key frame current in body stream；

4th acquisition module, for obtaining the media slicing at described key frame place according to described key frame；

Second logging modle, the corresponding relation between event identifier and described media slicing after recording change.

19. according to the media server described in claim 17 or 18, it is characterised in that after described key frame is described change The first I frame of the program indicated by event identifier.

20. media servers according to claim 14, it is characterised in that described in review in request and also include: intend reviewing The time started of program, described media server also includes:

First judge module, the media of event identifier and described program for judging the program of storage in described media server Whether the corresponding relation of burst records described plan and reviews the media slicing that the event identifier of program is corresponding；

Second sending module, for reviewing the media that the event identifier of program is corresponding when not recording described plan in described corresponding relation During burst, send to described Set Top Box and review media slicing corresponding to time started of program with described plan.

21. media servers according to claim 15, it is characterised in that described in review in request and also include: intend reviewing The time started of program, described device also includes:

Second judge module, the key of event identifier and described program for judging the program of storage in described media server Whether the corresponding relation of frame records described plan and reviews the key frame that the event identifier of program is corresponding；

3rd sending module, for reviewing the key that the event identifier of program is corresponding when not recording described plan in described corresponding relation During frame, send to described Set Top Box and review media slicing corresponding to time started of program with described plan.

22. 1 kinds of Set Top Boxes, it is characterised in that described Set Top Box includes:

Sending module, reviews request for sending to media server, described in review request and include intending reviewing the event of program Mark；

First receiver module, reviews according to described plan for receiving described media server described in the event identifier return of program The media slicing intending reviewing program plays out.

23. Set Top Boxes according to claim 22, it is characterised in that described Set Top Box also includes:

Second receiver module, for receiving the Media Stream of the programme televised live that described media server sends；

Preserving module, the Event Information Table EIT information in the Media Stream preserving described programme televised live, in described EIT information Event identifier including described programme televised live.

24. Set Top Boxes according to claim 23, it is characterised in that also include in described EIT information: described programme televised live Time started；

Described reviewing also includes in request that described plan reviews the time started of program.

25. 1 kinds of program look back systems, it is characterised in that described system includes:

Media server as described in claim 13 to 21 is arbitrary and the Set Top Box as described in claim 22 to 24 is arbitrary.