CN1117477C - Method for digital video signal on demand - Google Patents

Abstract

The invention relates to a method for ordering digital video signals, which mainly adopts the following steps: storing the digital video signals which are played in the on-demand server into a storage device of a user side computer; the computer storage device buffers the received digital video signal; the computer receives the digital video signals in the two channels simultaneously, but broadcasts the digital video signal in the second use channel first, and then broadcasts the digital video signal in the first use channel stored in the storage device. The method for ordering the program has the advantages of less occupied channels, low ordering cost, high efficiency, no limitation of the number of ordering people and the like particularly for hot-line programs.

Description

A method of digital video signal on demand

The invention relates to a method for digital video signal on-demand, which belongs to digital communication

technology field.

At present, the on-demand video signal usually adopts the method of real-time video on-demand. This method takes up many channels, and several channels need to be occupied by several people. The cost is high, and the price is unacceptable to ordinary people.

The purpose of the present invention is to provide a digital video signal on-demand method that occupies less channels and can be watched by multiple people at the same time.

In order to achieve the above object, the present invention adopts the following methods: consult the idle carrier, and determine at least two or more use channels in the idle carrier; the user orders the program; the digital video signal enters the user terminal computer storage device through the above use channel for buffering ; The computer storage device at the user end accepts digital video signals in two channels at the same time, among which the digital video signals within a set time interval are first broadcast through one channel, and then broadcast at the same time through the other channel Store all the digital video signals after the above-mentioned set time interval in the computer storage device, that is, use another channel to use the computer storage device to store and broadcast, until all the digital video signals are broadcast, another channel is used to store There is a time difference between the digital video signal and the broadcast digital video signal. By adopting the method of the invention to order programs, the user can first watch the broadcasted part, and then watch the digital video signal programs stored in the storage device without interval, so as to achieve the effect of watching the whole complete program.

Now in conjunction with accompanying drawing, the present invention will be further described:

Figure 1 is a block diagram of the digital video signal on-demand process when two channels are delineated in an idle carrier;

Figure 2 is a schematic diagram of the digital video signal on-demand effect when two channels are used;

Figure 3 is a schematic diagram of digital video signal on-demand effects when three channels are used;

Figure 4 is a schematic diagram of digital video signal on-demand effects when four channels are used;

Fig. 5 is a block diagram of the system connection of the present invention.

As shown in Figure 1, the following steps can be taken to order a program when two channels are designated in an idle carrier:

——Check the idle carrier, define two channels in the idle carrier, and set a period of time for users to order programs;

——Accept the first batch of users, notify users of the carrier frequency and use of the first channel, notify users of the broadcast time, and the first channel will broadcast on time;

——Accept the second batch of users, notify the user of the carrier frequency and the use of the first and second channels, notify the user of the broadcast time of the second channel, and broadcast the second channel on time; at this time, the computer simultaneously accepts digital video signals in the two channels , but the digital video signal within the first set time interval of the on-demand program is played by the second used channel, and then the computer storage device then broadcasts the first used channel stored in the memory after the first set time interval of the program. All digital video signals in the device;

——Accept the third batch of users, notify the user of the carrier frequency and the use of the first and second channels, notify the user of the broadcast time of the second channel, and broadcast the second channel on time; at this time, the computer simultaneously accepts the digital video in the two channels signal, the second channel waits until the end of the first set time interval, that is, the second set time interval starts to broadcast the digital video signals broadcast by the first and second batch of users, and then broadcasts after the second set time interval all digital video signals stored in the storage device using the first used channel;

——Accept the fourth batch of users, notify the user of the carrier frequency and the use of the first and second channels, and notify the user of the broadcast time of the second channel, and the second channel will be broadcast on time; at this time, the computer accepts the numbers in the two channels at the same time For video signals, the second channel waits until the end of the second set time interval, that is, the third set time interval starts to broadcast the digital video signals broadcast by the first, second, and third batches of users, and then broadcasts the third set time interval Utilize all the digital video signals stored in the storage device by the first use channel after the time interval; and so on, until the last batch of users is accepted;

——Check whether the first channel has been broadcasted. If not, you can continue to watch. If it has been broadcasted, you can check the on-demand configuration. According to the on-demand system configuration, if there are several available channels, the length of the on-demand program, etc., Pre-edit the program, set the broadcast time interval, and continue to accept the user's request for the next cycle.

As shown in Fig. 2, it is a schematic diagram of the on-demand effect when two usable channels are designated in the idle carrier. Set time interval 9 to be used for user's order program; Utilize the storage device in the computer, buffer the first use channel 1 digital video signal in broadcasting, utilize the second use channel 2 to broadcast the part 10 that the first use channel has started broadcasting simultaneously , the computer accepts the digital video signals in the two channels 1 and 2 at the same time, but first broadcasts the signal in the second channel 2, and then broadcasts the signal in the storage device in the first channel 1. If the program is on demand The time is 90 minutes as an example, and the pre-set on-demand program is broadcast every 5 minutes as a broadcast time interval, then the second channel 2 will broadcast the first five-minute program broadcast by the first channel at the fifth to ten minutes , That is to say, the second group of users can watch the digital video signal content of the first five minutes of the on-demand program through the second channel at five to ten minutes, and then watch the program stored by the computer storage device five minutes after the program starts using the first use channel. All digital video signal contents in the storage device; the second use channel 2 broadcasts the first ten minutes program that the first use channel first broadcasts in ten to twenty minutes, that is to say, the third batch of users can At 20 minutes, watch the digital video signal content of the first ten minutes of the on-demand program through the second channel, and then watch the entire digital video signal content stored in the storage device by using the first use channel after ten minutes of the computer storage device program; 2. Use channel 2 to broadcast the first 20 minutes of programs first broadcast by the first use channel at 20 to 40 minutes, that is, the fourth batch of users can watch on-demand programs through the second channel at 20 to 40 minutes The first 20 minutes of the digital video signal content of the program, and then watch the entire digital video signal content stored in the storage device by using the first channel 2 in the 40 to 20 minutes after the computer storage device program starts; At eighty minutes, the first forty minutes of the program first aired on the first used channel... . As shown in Figure 3, the on-demand effect diagram under the three channels used, the first half of the on-demand program can be watched within five to ten minutes after the on-demand program starts. As shown in Figure 4, it is a schematic diagram of the on-demand effect under the four used channels. If the on-demand program time is still 90 minutes as an example, and the on-demand program is preset to be broadcast every five minutes as a broadcast time interval, then forty minutes Minutes later, the fourth channel in use can start broadcasting from beginning to end, that is, the cycle of on-demand programs can be realized. At any time, the user only needs to receive the signals in two channels at the same time, and can watch the program on demand within five to ten minutes after ordering. If there are more channels, it can be watched after any time interval, no matter how many people order. As shown in Figure 5, the method used in the present invention is to utilize the client computer 7 and its storage device 8 to connect to the on-demand server 5 through 10M or 100M Ethernet or cable TV cable or wireless or satellite.

Another embodiment of the present invention is that when recording a program, it can be recorded into a computer storage device, and by using the buffer function of the computer storage device, it can be watched while recording at any time during the recording of the program.

Using the method of the invention to order programs has the advantages of less channel occupation, low order cost and high efficiency, especially for hotline programs, which are not limited by the number of people ordering.

Claims (3)

1. the method for a digital video signal requesting, it is characterized in that adopting the following step: (1) consults idle carrier wave, determines plural at least use channel in this free time carrier wave; (2) after user's request program, digital video signal enters in the user end computer memory device by above-mentioned use channel and cushions; (3) the user end computer memory device is accepted two digital video signals that use in the channel simultaneously, wherein by a digital video signal that uses in channel broadcast request program earlier first setting-up time interval, the back is broadcasted at one time by another and is used whole digital video signals after channel deposits the above-mentioned special time of computer memory device in, and a back use channel limit deposits in, broadcast on the limit, until finishing whole digital video signals, between the digital video signal that a back use channel deposits in and the digital video signal of broadcast there is a time difference.

2, according to the method for a kind of digital video signal requesting described in the claim 1, it is characterized in that: (1) consults idle carrier wave, delimit two and use channels in idle carrier wave, sets broadcast time to be used for user's request program at interval; (2) accept first user, notify the subscribers carrier frequency and use first channel, notify the user broadcast time, first channel broadcasts on time; (3) accept second crowd of user, notice subscribers carrier frequency and use first and second channel is notified the user second channel broadcast time, and second uses channel to broadcast on time; This computer-chronograph is accepted two digital video signals in the channel simultaneously, begin the digital video signal of first setting-up time at interval but use channel to broadcast request program, then broadcast by computer memory device then and begin first setting-up time at program and utilize after at interval first to use channel to be stored in whole digital video signals in the memory device by second; (3) accept the 3rd crowd of user, notice subscribers carrier frequency and use first and second channel notifies user second to use channel broadcast time, and second uses channel to broadcast on time; This computer-chronograph is accepted two digital video signals in the channel simultaneously, second channel treats to finish promptly by first setting-up time at interval, and at first second setting-up time broadcast the digital video signal that first and second batch user has broadcasted at interval, then broadcasts second setting-up time then and utilize after at interval first to use channel to be stored in whole digital video signals in the memory device; (4) accept the 4th crowd of user, notice subscribers carrier frequency and use first and second channel, and notify user second to use channel broadcast time, second uses channel to broadcast on time; This computer-chronograph is accepted two digital video signals in the channel simultaneously, second channel treats to finish promptly by second setting-up time at interval, and at first the 3rd setting-up time broadcast the digital video signal that first, second and third batch user has broadcasted at interval, then broadcasts the 3rd setting-up time then and utilize after at interval first to use channel to be stored in whole digital video signals in the memory device; Analogize in proper order, until having accepted the last batch of user; (5) whether inquiry first uses channel to finish, if do not finish, can continue to watch, if finish, can consult the program request configuration, dispose according to VOD system, if any several channel, program-requesting time length etc. used, programmed is set the broadcast time section in advance, continues to accept user's program request of next circulation.

3, the method for a kind of digital video signal requesting according to claim 1 and 2 is characterized in that: also can delimit the use channel more than three or three in idle carrier wave.

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