JP2003339021A - Video output device and method - Google Patents

Abstract

(57) [Summary] [Problem] Even in the case of editing playback such as playlist playback, a video in which character data at the start point and end point of one scene can be connected in a complete character string state An output device and method are provided. A video output method for outputting video data including character data, wherein a head character is detected from the read character data, a frame position of the corresponding video data is stored, and reproduction of the video data is performed. The start frame position is stored, and the nearest frame position that is temporally earlier than the frame position and in which a code indicating meaningless character data next to the EOC code exists is stored and stored. The dummy video data is reproduced and output up to the nearest frame position that is temporally before the current frame position and has a code indicating that it is meaningless character data next to the EOC code. Thereafter, the video data is reproduced and output.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides character information for extracting a desired portion of a user from character information such as video signal closed caption data recorded as digital data by a DVD recorder or the like and connecting and reproducing it. The present invention relates to an added video output device.

[0002]

2. Description of the Related Art Closed captions (hereinafter referred to as "CC") that directly display the actor's dialogue, narration, sound effects, etc. as subtitles so that the deaf user can enjoy broadcast programs, videos, and the like. ) Has been developed subtitle display technology. In CC, by superimposing characters for subtitle display on the video signal,
Subtitles synchronized with the video are displayed. This character information is superimposed on 21 lines of the video signal vertical blanking period.

In order to display these character information on the screen, a decoder for decoding the character information to be multiplexed with the video signal and displaying it on the screen is required. Whether or not the character is displayed is selected by the user. It is up to you.

Recording of CC data (character data) on a DVD is realized by using a method disclosed in Japanese Patent Laid-Open No. 2001-223994. Figure 7
Shows a logical configuration of video data, CC data, etc. recorded on a DVD.

VOB in the DVD recording standard
(Video Object) is a recording unit of video data and audio data of one TV program or the like, and the video data and audio data unit corresponding to 0.4 to 1 second is called a VOBU (Video Object Unit). There is.

In this VOBU, a navigation pack N having data of 2 kilobytes in which information such as a buffer size and a transmission rate to be secured at the time of reproduction is stored, and a plurality of video packs storing a plurality of video data. Audio pack A containing V or audio data
And are stored as a set.

One VOBU has one or two GOPs.
(Group Of Picture),
The GOP is a GOP header that stores time code,
It is composed of P pictures and B pictures, and each picture corresponds to image data of 15 frames.

The first field and the second which make up the frame
The 21st line of the field has a 16-bit first area and a second area each of which stores character information for two characters. The character information (first character information) stored in the first area is a character code and parity bit used only for CC data, and the character information (second character information) stored in the second area is This is information other than CC data. The first character information and the second character information are stored in the extended & user data area in the GOP.

Then, in the case of a playlist reproduction in which a favorite portion is taken out from the image recorded on the DVD and is joined and reproduced, the recorded image is reproduced once and the first frame of the favorite portion is reproduced. By storing the time stamp of the last frame and reproducing the video between the stored time stamps, video reproduction accompanied by CC data (character data) is realized.

[0010]

However, as described above, the reproduction start point and the reproduction end point corresponding to the first frame and the last frame of the favorite portion of the video data determined by watching the video once reproduced. However, with regard to character data, it is not always a break between sentences or character strings. Therefore, when the video data accompanied by the character data is reproduced based on the reproduction start point and the reproduction end point, in particular, the first character string or the last character string of the character data may be incompletely displayed. There was a problem that it was left.

In order to solve the above problems, the present invention provides
Even in the case of editing playback such as playlist playback,
An object of the present invention is to provide a video output device and method capable of connecting character data at a start point and an end point of one scene in a complete character string state.

[0012]

In order to achieve the above object, a video output device according to the present invention is a video output device for outputting video data including character data, the video data to be reproduced and the character data. A video / character data reading unit that reads out the first character, a first character detection unit that detects the first character in the character string from the read character data, and a frame of video data corresponding to the first character detected by the first character detection unit The head character corresponding frame position storage unit that stores the position, the head video frame position storage unit that stores the frame position at which the video data playback starts, and the time position that is greater than the frame position stored in the head video frame position storage unit. At the frame position immediately before the EOC code and a code indicating meaningless character data after the EOC code. Character data read start frame control section, dummy video data output section that outputs dummy video data, video data switching section that switches between dummy video data and video data, and character data is added to the video data and output In the video data switching unit including the character data addition unit, the dummy video data is reproduced and output up to the frame position stored in the character data read start frame control unit, and the video data is reproduced and output thereafter. Characterize.

A video output device according to the present invention is a video output device for outputting video data including character data, and includes a video / character data reading section for reading video data and character data to be reproduced, and a read-out device. A character data storage unit that sequentially stores the character data, and a character data monitoring unit that searches the character data for an EOC code and a code indicating meaningless character data and controls the character data storage unit. , A character data switching unit that switches the character data to be added to the video data, a head video frame position storage unit that stores the frame position to start the reproduction of the video data, and a character data addition that adds the character data to the video data and outputs In the character data monitoring unit including the part, the frame position where the meaningless character data is located after the EOC code is detected. In this case, the character data stored in the character data storage unit is erased, and when the character data storage unit does not store the character data, the read video data is replaced with the character data. When the character data is stored in the storage unit, the character data stored in the character data storage unit is switched to be added.

Further, the video output device according to the present invention is
A video output device for outputting video data including character data, comprising: a video / character data reading unit for reading video data and character data to be reproduced; and a final character in a character string from the read character data. The final character detection unit for detecting, the final video frame position storage unit for storing the frame position at which the reproduction of the video data ends, and the time position after the frame position stored in the final video frame position storage unit. And a character data read end frame control unit that stores the most recent frame position where a code indicating meaningless character data next to the EOC code exists, and a dummy video data output unit that outputs dummy video data. , A video data switching unit that switches between dummy video data and video data, and character data is added to the video data. It includes character data adding unit for outputting,
The video data switching unit is characterized in that the video data is reproduced and output up to the frame position stored in the character data read end frame control unit, and the dummy video data is reproduced and output thereafter.

With this configuration, when a predetermined portion of video data having character data is cut out and reproduced, the character data is reproduced as a complete character string regardless of the cut-out position designated as the reproduction target. It is possible to add the character data to the video data and output the character data and the video data after the cutout position while maintaining the temporal relationship in frame units.

Next, in order to achieve the above object, a video output method according to the present invention is a video output method for outputting video data including character data, and a step of reading out video data and character data to be reproduced. A step of detecting the first character in the character string from the read character data, a step of storing the frame position of the video data corresponding to the detected first character, and a frame position for starting the reproduction of the video data. And a step of storing the latest frame position which is before the stored frame position and has a code indicating meaningless character data next to the EOC code. , A step of outputting dummy video data, a step of switching between the dummy video data and the video data, and a step of adding character data to the video data and outputting it. In the step of switching the video data, including the step, the latest frame which is before the stored frame position and has a code indicating meaningless character data next to the EOC code. It is characterized in that the dummy video data is reproduced and output up to the position, and the video data is reproduced and output after that.

A video output method according to the present invention is a video output method for outputting video data containing character data, which comprises a step of reading the video data and the character data to be reproduced, and the read character data sequentially. The step of storing, the step of searching the character data for an EOC code and a code indicating meaningless character data and controlling the sequential storage of the character data, and the character data to be added to the video data are switched. In the step of controlling the sequential storage of the character data, the step of storing the frame position where the reproduction of the video data is started and the step of adding the character data to the image data and outputting the character data is performed. When a frame position with meaningful character data is detected, the stored character data is deleted and the process of switching the character data is performed. There are, the video data read out when the character data is not stored, if the character data is stored and switches so as to add the character data stored.

Furthermore, the video output method according to the present invention is
A video output method for outputting video data including character data, the step of reading video data and character data to be reproduced, and the step of detecting the last character in the character string from the read character data, A step of storing a frame position at which the reproduction of the video data is finished, and a step of storing the frame position temporally behind the stored frame position and E
A step of storing the closest frame position where a code indicating meaningless character data next to the OC code exists, a step of outputting dummy video data, and a step of switching between dummy video data and video data In the step of switching the video data, including the step of adding the character data to the video data and outputting the character data, the meaningless character data is behind the stored frame position and is next to the EOC code. It is characterized in that the video data is reproduced and output up to the nearest frame position where the code indicating that is present, and thereafter the dummy video data is reproduced and output.

With such a configuration, when a predetermined portion of video data having character data is cut out and reproduced, the character data is reproduced as a complete character string regardless of the cut-out position designated as the reproduction target. It is possible to reproduce, and it is possible to add the character data to the video data and output the character data and the video data after the cutout position while maintaining the temporal relationship in frame units.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION (Embodiment 1) Hereinafter, a video output apparatus according to Embodiment 1 of the present invention will be described with reference to the drawings. 1 is a block configuration diagram of a video output device according to a first embodiment of the present invention.

In FIG. 1, reference numeral 11 denotes a video / character data reading unit for reading video data and CC data (character data), which reads video data and character data to be reproduced.

Reference numeral 12 denotes a leading character detecting section, which judges whether or not the read character data is the character data located at the beginning of the character string.
When the character data is located at the beginning of the character string, the frame position of the video data corresponding to the character data determined to be located at the beginning of the character string is stored in the head character corresponding frame position storage unit 13. Become.

Reference numeral 14 denotes a character data read start frame control section, which is an EOC from the character data.
Is detected, and then the frame positions where character data other than NULL data exist are sequentially stored.

On the other hand, the frame position of the video data which the user desires to reproduce is stored in the head video frame position storage unit 15. Reference numeral 16 denotes a dummy video data output unit, which outputs dummy video data to be displayed only while outputting only the character data when the frame position of the video data desired to be reproduced by the user is in the middle of the character data. Then, the video data switching unit 17 switches the video data reproduced from a predetermined frame position and the video data to be dummy-displayed according to the condition.

Finally, in the character data adding section 18,
Predetermined character data is added to the video data or the dummy video data.

To explain more specifically, referring to FIG. 2, the video data and CC data stored in the DVD, the video data generated by the video output device according to the present embodiment, and the additional data are added. The processing of character data will be described in time series.

In FIG. 2, when creating a playlist, it is assumed that the video data once recorded is first reproduced, and the frame position of the video data desired to be reproduced, for example, SCEAN6 is designated by the user. In this case, S
The time stamp 6 corresponding to CEAN 6 is stored in the head video frame position storage unit 15.

Next, going back from SCEAN6 for a certain period of time,
CC data up to the start video frame position will be read. Then, the control code EOC indicating the end of the character string is detected from the read CC data. That is, if there is character data other than NULL data next to the control code EOC, it is known that the character data is the character data located at the beginning of the next character string. Therefore, the head character corresponding frame position storage unit 13
Then, the time stamp of the position where the character data other than the NULL data is detected next to the control code EOC is stored. In FIG. 2, the time stamp 2 is stored first, and then the time stamp 5 is stored. In this way, the setting of the start point in the play list reproduction is completed.

When the play list is reproduced next, the character data read start frame control unit 14 starts reading from the time stamp 5 stored in the head character corresponding frame position storage unit 13. At that time, the video data switching unit 17 constantly monitors the time stamp at the time of reproduction, and the head video frame position storage unit 15
Until the time stamp 6 stored in is output, SCEANNULL, which is a dummy video output by the dummy video data output unit 16, is output as video data,
After the time when the time stamp becomes 6, the video data of SCEAN6 recorded on the DVD is output.

Then, by the character data adding section 18,
During the time stamp 5, the read character data is a dummy image, SCEANNULL, and the time stamp 6.
After that, the video data of SCEAN6 is superimposed and outputted.

As described above, according to the first embodiment, the character data can be displayed and output from the beginning of the character string even when the video data accompanied by the character data is reproduced based on the reproduction start point. As a result, the character data can be connected in the state of a complete character string.

(Second Embodiment) A video output device according to a second embodiment of the present invention will be described below with reference to the drawings. FIG. 3 is a block configuration diagram of a video output device according to the second embodiment of the present invention. Note that, in FIG. 3, components having the same functions as those in the first embodiment are designated by the same reference numerals as those in FIG. 1, and detailed description thereof will be omitted.

In FIG. 3, reference numeral 11 denotes a video / character data reading section for reading the video data and the CC data (character data). As in FIG. 1, the video data and the character data to be reproduced are read. .

Reference numeral 31 denotes a character data storage unit, which is a memory for sequentially storing the character data read by the video / character data reading unit 11 as it is in a FIFO.

Reference numeral 32 denotes a character data monitoring unit, which detects EOC from the character data sent to the character data storage unit 31 and, when EOC is detected, displays the contents of the character data storage unit 31. It controls to delete all.

On the other hand, the frame position of the video data which the user desires to reproduce is stored in the head video frame position storage unit 15. Then, in the video data read start frame control unit 34, the reproduction is started from the frame position of the video data stored in the head video frame position storage unit 15.

Further, the character data addition switching unit 33 is
The character data read out by the video / character data reading unit 11 when the character data storage unit 31 does not store the character data, and the character data stored in the character data storage unit 31 when the character data storage unit 31 stores the character data. Data
The data is added to the video data by the character data adding unit 18 and output.

For more specific description, referring to FIG. 4, the video data and CC data stored in the DVD, the video data generated by the video output device according to the second embodiment, and the additional data. With respect to the character data to be processed, the processing will be described in time series.

In FIG. 4, when creating a playlist, it is assumed that the video data once recorded is first reproduced, and the frame position of the video data desired to be reproduced, for example, SCEAN3 is designated by the user. In this case, S
The time stamp 3 corresponding to CEAN3 is stored in the head video frame position storage unit 15.

Next, going back from SCEAN3 for a fixed time,
CC data up to the start video frame position will be read. Then, the read CC data itself is stored in the character data storage unit 31. In addition, in the third embodiment, the character data storage unit 31 is assumed to be a FIFO type memory.

The character data monitoring unit 32 constantly monitors the character data stored in the character data storage unit 31. When the character data monitoring unit 32 detects the EOC indicating the end of the character string, All the data stored in the data storage unit 31 is deleted. Further, when the data is data other than NULL data, the read CC data is sequentially stored as it is.

The reading process is performed up to one frame before the time stamp 3 written in the head frame position storage unit 15, and up to the time stamp 2 in the third embodiment.

Next, when the play list is reproduced, the video data read start frame control unit 34 starts reading from the time stamp 3 stored in the head video frame position storage unit 15. At this time, as the character data to be added, the character data stored in the character data storage unit 31 is taken out and added to the video data of the SCEAN 3 by the character data addition unit 18.
This is because the character data read from the DVD is stored in the character data storage unit 31 unless it is NULL data.

When the reading is started from the time stamp 3 written in the head frame position storage unit 15, the character data added to the SCEAN4 is NU.
Since the character data monitoring unit 32 detects that it is LL, it is not stored in the character data storage unit 31 in this case. Then, each time NULL is detected, the data storage amount in the character data storage unit 31 decreases.

Further, when the data of the time stamp 5 is read, since the data in the character data storage unit 31 is gone, the character data addition switching unit 33 changes the character data added in the character data addition unit 18 to the character data. The character data read from the video / character data reading unit 11 instead of the data storage unit 31 is switched to.

As described above, according to the second embodiment, in the cutout start frame designated as the reproduced image,
Since the character data can be displayed and output from the beginning of the character string regardless of which frame is cut out, it is possible to connect the character data in a complete character string state.

(Third Embodiment) A video output device according to a third embodiment of the present invention will be described below with reference to the drawings. FIG. 5 is a block diagram of a video output device according to the third embodiment of the present invention. Note that, in FIG. 5, constituent elements having the same functions as those in the first embodiment are denoted by the same reference numerals as those in FIG. 1, and detailed description thereof will be omitted.

In FIG. 5, reference numeral 51 denotes a final character detector, which judges whether the read character data is the character data located at the end of the character string, If it is the character data located at the end of the column, the character data read end frame control unit 5
2, the EOC is detected from the character data, and the frame position where the NULL data exists next is stored.

On the other hand, the frame position of the video data which the user desires to reproduce is stored in the final video frame position storage section 53. That is, the frame position designated by the user who wants to view the video data up to this point is stored.

In order to describe the case of the configuration shown in FIG. 5 more specifically, referring to FIG. 6, the video data and CC data stored in the DVD and the video output device according to the third embodiment will be described. The processing of the generated video data and the added character data will be described in time series.

In FIG. 6, when a playlist is created, the video data once recorded is first reproduced, and the final frame position of the video data desired to be reproduced by the user,
For example, it is assumed that SCEAN8 is designated. In this case, the time stamp 8 corresponding to SCEAN8 is stored in the final video frame position storage unit 53.

Next, going back from SCEAN8 for a fixed time,
CC data up to the start video frame position will be read. Then, the control code EOC indicating the end of the character string is detected from the read CC data. That is, if there is NULL data next to the control code EOC, it can be known that the character data is the character data located at the end of the character string. Therefore,
The control code EOC is sent to the read end frame controller 52.
Next, the time stamp of the position where the NULL data is detected will be stored. In FIG. 6, the time stamp 9 is stored first. Thus, the setting of the end point in the play list reproduction is completed.

When the play list is reproduced next, the play list is reproduced until the time stamp 8 stored in the final video frame position storage section 53 is reached. Then, the final character detection unit 51 determines whether the character data up to the time stamp 8 is in the middle of the sentence, that is, E
Presence or absence of OC code and NU after the EOC code
It is determined whether or not there is LL data.

For example, the EOC code is detected and the E
When it is detected that the NULL data continues after the OC code, the playlist is ended at the time stamp position stored in the final video frame storage unit 53. If not, the video / character data reading unit 11 continuously reads the video data and character data from the DVD until the next EOC code is detected.

At this time, from the frame next to the time stamp 8, the video data to be passed to the character data adding unit 18 is switched to the dummy video data from the dummy video data output unit 16 by the video data switching unit 17. The dummy video data output unit 16 outputs a video signal different from the video data recorded on the DVD so that the character data can be easily seen.

Further, as the dummy image data, the last image data SCEAN8 may be continuously reproduced.

Finally, when the character information judgment means detects EOC in the character data read from the DVD, the read end frame control section ends the reproduction of the playlist.

As described above, according to the third embodiment, the character data can be displayed and output up to the end of the character string even when the video data accompanied by the character data is reproduced based on the reproduction end point. As a result, the character data can be connected in the state of a complete character string.

[0059]

As described above, according to the video output device of the present invention, when a predetermined portion of video data having character data is cut out and played back, the cutout position designated as the playback target is whatever. Character data can be played back in the form of a complete character string, and character data and video data after the cutout position can be output by adding character data to the video data while maintaining the temporal relationship in frame units. It becomes possible to do.

[Brief description of drawings]

FIG. 1 is a block configuration diagram of a video output device according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of time series processing in the video output device according to the first embodiment of the present invention.

FIG. 3 is a block configuration diagram of a video output device according to a second embodiment of the present invention.

FIG. 4 is an explanatory diagram of time series processing in the video output device according to the second embodiment of the present invention.

FIG. 5 is a block configuration diagram of a video output device according to a third embodiment of the present invention.

FIG. 6 is an explanatory diagram of time series processing in the video output device according to the third embodiment of the present invention.

FIG. 7 is a logical configuration diagram of data recorded on a conventional DVD.

[Explanation of symbols]

11 Video / character data readout section 12 First character detector 13 Frame position storage unit corresponding to the first character 14 Character data read start frame controller 15 First video frame position storage section 16 Dummy video data output section 17 Video data switching section 18 Character data addition part 31 Character data storage 32 character data monitoring unit 33 Character data switching section 34 Video data read start frame control unit 51 Final character detector 52 Character data read end frame control unit 53 Final video frame position storage unit

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H04N 5/85 H04N 5/93 Z 5/91 5/91 EF term (reference) 5C052 AA01 AA02 AC08 DD04 EE02 EE03 5C053 FA23 FA24 GB05 GB38 HA29 JA16 KA01 KA24 LA06 LA11 5D044 AB07 BC02 CC06 DE18 DE40 FG19 5D077 AA23 BA09 CA02 DC08 HA07

Claims (6)

[Claims] 1. A video output device for outputting video data including character data, comprising: a video / character data reading section for reading video data and character data to be reproduced; A head character detection unit that detects a head character in a character string; a head character corresponding frame position storage unit that stores a frame position of the video data corresponding to the head character detected by the head character detection unit; And a head video frame position storage unit that stores a frame position for starting the reproduction of a frame, a time position that is before the frame position stored in the head video frame position storage unit, and that is next to the EOC code. Character data read start frame that stores the most recent frame position where a code indicating that it is meaningful character data exists Control unit, a dummy video data output unit for outputting dummy video data, a video data switching unit for switching between the dummy video data and the video data, and character data for adding the character data to the video data for output. In the video data switching unit, including the addition unit, the dummy video data is reproduced and output up to the frame position stored in the character data read start frame control unit, and thereafter, the video data is reproduced and output. A video output device characterized by the above. 2. A video output device for outputting video data including character data, comprising a video / character data reading unit for reading video data and character data to be reproduced, and sequentially storing the read character data. A character data storage unit, an EOC code and a code indicating meaningless character data are searched from the character data, and a character data monitoring unit that controls the character data storage unit is added to the video data. A character data switching unit that switches character data, a head video frame position storage unit that stores a frame position to start reproduction of the video data, and a character data addition unit that adds the character data to the video data and outputs the data. In the character data monitoring section, a frame position where meaningless character data is detected next to the EOC code is detected. In this case, the character data stored in the character data storage unit is erased, and the character data switching unit reads the read character data when the character data is not stored in the character data storage unit. A video output device, wherein video data is switched so as to add the character data stored in the character data storage unit when the character data is stored in the character data storage unit. 3. A video output device for outputting video data including character data, comprising: a video / character data reading unit for reading video data and character data to be played back, and a read-out character data from the read character data. A final character detection unit that detects a final character in a character string, a final video frame position storage unit that stores a frame position at which the reproduction of the video data ends, and a frame position stored in the final video frame position storage unit Behind in time and EOC
A character data read end frame control unit that stores the latest frame position where a code indicating meaningless character data exists next to the code, a dummy video data output unit that outputs dummy video data, and the dummy Video data and a video data switching unit that switches the video data, and a character data adding unit that adds the character data to the video data and outputs the video data, wherein the video data switching unit includes the character data read end frame control unit. A video output device which reproduces and outputs the video data up to the frame position stored in, and reproduces and outputs the dummy video data thereafter. 4. A video output method for outputting video data including character data, comprising a step of reading video data and character data to be reproduced, and a first character in a character string from the read character data. A step of detecting a frame position of the video data corresponding to the detected first character, a step of storing a frame position at which the reproduction of the video data is started, and the stored frame position A step of storing the latest frame position where a code indicating meaningless character data before the EOC code exists before the time, and a step of outputting dummy video data, A step of switching between the dummy video data and the video data; and a step of adding the character data to the video data and outputting the data. In the step of switching the video data, up to the nearest frame position, which is before the stored frame position and has a code indicating meaningless character data next to the EOC code, A video output method comprising reproducing and outputting the dummy video data, and thereafter reproducing and outputting the video data. 5. A video output method for outputting video data including character data, comprising the steps of reading video data and character data to be reproduced, and sequentially storing the read character data. A step of searching the character data for an EOC code and a code indicating meaningless character data and controlling sequential storage of the character data; a step of switching the character data to be added to the video data; A step of storing a frame position where reproduction of the video data is started, and a step of adding the character data to the video data and outputting the frame data;
When a frame position having meaningless character data after the OC code is detected, the stored character data is erased, and in the step of switching the character data, when the character data is not stored, The video output method, wherein the read video data is switched so as to add the stored character data when the character data is stored. 6. A video output method for outputting video data including character data, comprising a step of reading video data and character data to be reproduced, and a final character in a character string from the read character data. Detecting a frame position at which reproduction of the video data ends, and storing meaningless character data after the EOC code that is temporally behind the stored frame position. A step of storing the most recent frame position where the code indicating that is present, a step of outputting dummy video data, a step of switching the dummy video data and the video data, and the character data in the video data In the step of switching the video data, the time is longer than the stored frame position. The video data is reproduced and output up to the closest frame position after the EOC code, which is a code indicating meaningless character data after the EOC code, and thereafter, the dummy video data is reproduced. A video output method characterized by outputting.