CN103888845A - Digital screen broadcasting on demand system and method thereof - Google Patents
Digital screen broadcasting on demand system and method thereof Download PDFInfo
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- CN103888845A CN103888845A CN201410112432.1A CN201410112432A CN103888845A CN 103888845 A CN103888845 A CN 103888845A CN 201410112432 A CN201410112432 A CN 201410112432A CN 103888845 A CN103888845 A CN 103888845A
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Abstract
A digital screen broadcasting on demand system and method thereof comprise a main server which is connected with a radio and television cable broadband network and is used for digital screen broadcast control, a secondary sever used for cable television broadcasting on demand, and a secondary server used for notice signal broadcasting. The radio and television cable broadband network is connected with a wireless router, the wireless router is connected with more than one wireless network card in a wireless mode, each wireless network card is arranged in the corresponding wireless digital screen, controllers of the wireless digital screens are connected with the corresponding wireless network cards and the corresponding wireless digital screens respectively through actuators, each wireless digital screen is provided with a corresponding adaptive remote control, and the defect that inconvenience in broadcasting is actually brought out by messy codes, unclear pictures and complex modes and structures on the screen caused by the fact that orderly broadcasting on demand cannot be achieved in the existing technology is effectively avoided by the combination of the method of broadcasting on demand.
Description
Technical field
The invention belongs to for digital screen technical field, be specifically related to a kind of digital screen VOD system and order method thereof.
Background technology
Existing Digital Television is because image quality is clear and the mode of networking is applied more and more widely, but because flow in the time that program request is transmitted at digital audio/video, because the packet amount of audio frequency and video is too large, even compress before transmission, packet amount is also high, after having added Digital TV Receiving, also need the reprocessing that decompresses, then resolve, so often cannot realize orderly program request and show the mess code causing on screen, picture will be unclear, and the mode of this complexity and structure have been brought the inconvenience of playing really.
Summary of the invention
The object of this invention is to provide a kind of digital screen VOD system and order method thereof, comprise the master server for digital screen Broadcast Control that same broadcasting and TV cable broadband network is connected, the secondary server of playing for the secondary server of catv on demand and for right of way signal, broadcasting and TV cable broadband network is connected with wireless router, the same above wireless network card phase wireless connections of wireless router, each wireless network card is built in respectively in each self-corresponding wireless digital screen, the controller of each wireless digital screen is connected with driver with wireless digital screen with wireless network card separately, each wireless digital screen disposes respectively adaptive separately remote controller, and can effectively avoid of the prior art in conjunction with its order method and cannot realize orderly program request and show the mess code causing on screen, the mode that picture is unclear and complicated and structure have been brought the inconvenient defect of playing really.
In order to overcome deficiency of the prior art, the invention provides a kind of digital screen broadcast control system and broadcast control method thereof, specific as follows:
A kind of digital screen VOD system, comprises the master server 1 for digital screen Broadcast Control that same broadcasting and TV cable broadband network 5 is connected, the secondary server 4 of playing for the secondary server 3 of catv on demand and for right of way signal, broadcasting and TV cable broadband network 5 is connected with wireless router 6, the same above wireless network card 7 phase wireless connections of wireless router 6, each wireless network card 7 is built in respectively in each self-corresponding wireless digital screen 8, the controller 10 of each wireless digital screen 8 is connected with driver 11 with wireless digital screen with wireless network card 7 separately, each wireless digital screen 8 disposes respectively adaptive separately remote controller 9, and described remote controller 9 outer walls are provided with liquid crystal display screen 13, by being 0 with Digital ID respectively, Digital ID is 1, Digital ID is 2, Digital ID is 3, Digital ID is 4, Digital ID is 5, Digital ID is 6, Digital ID is 7, Digital ID is 8, Digital ID is the digital keys group 14 of nine digital keys composition of 9 and for selecting the confirmation button 15 of channel, in described remote controller 9, be provided with processor 12, processor 12 is same for selecting the confirmation button 15 of channel and being 0 with Digital ID respectively by key encoder 19, Digital ID is 1, Digital ID is 2, Digital ID is 3, Digital ID is 4, Digital ID is 5, Digital ID is 6, Digital ID is 7, Digital ID is 8, Digital ID is that nine digital keys of 9 are connected, and liquid crystal display screen 13 is connected with the processor 12 of remote controller 9 interior settings.
In the hard disk of the described secondary server 3 for catv on demand, be provided with the video on demand fdisk of same quantity by cable television channels quantity, the corresponding video on demand fdisk of each cable television channels, each video on demand is being deposited the audio data stream of the cable television channels required program request corresponding with it with fdisk and is being needed the video data stream of program request, need the audio frame in the audio data stream of program request to be arranged in order according to the order from arriving first of reproduction time, need the frame of video in the video data stream of program request to be arranged in order according to the order from arriving first of reproduction time, be provided with in addition the video on demand memory partitioning of same quantity by cable television channels quantity at the internal memory of the secondary server 3 for catv on demand, the corresponding video on demand memory partitioning of each cable television channels, in hard disk for the secondary server 3 of catv on demand, be also provided with audio/video player in addition, the secondary server 4 of playing for right of way signal is provided with the right of way signal broadcasting fdisk of same quantity by cable television channels quantity, the corresponding right of way signal broadcasting fdisk of each cable television channels, each fdisk is being deposited the data flow of the right of way signal of the cable television channels required program request corresponding with it, need the Frame of the right of way signal in the data flow of right of way signal of program request to be arranged in order according to the order from arriving first of reproduction time, be provided with in addition the right of way signal broadcasting memory partitioning of same quantity by cable television channels quantity at the internal memory of the secondary server 4 of playing for right of way signal, the corresponding right of way signal broadcasting memory partitioning of each cable television channels, in the hard disk of the secondary server 4 of playing for right of way signal in addition, be also provided with picture playing device.
The order method of described digital screen VOD system, step is as follows:
Step 1: first start the master server 1 for digital screen Broadcast Control that same broadcasting and TV cable broadband network 5 is connected, the secondary server 4 of playing for the secondary server 3 of catv on demand and for right of way signal, then the secondary server 4 of playing to the secondary server 3 for catv on demand and for right of way signal respectively for the master server 1 of digital screen Broadcast Control sends the packet and packet start-up time play of right of way signal start-up time of cable television channels program request, packet start-up time of described cable television channels program request comprises the start-up time of the channel of each cable television channels and the audio frequency and video to program request that should cable television channels, the start-up time that packet start-up time that described right of way signal is play comprises the channel of each cable television channels and right of way signal that should cable television channels is play, if having received respectively the secondary server 4 of playing for right of way signal, the secondary server 4 of playing for the secondary server 3 of catv on demand with for right of way signal sends the packet and packet start-up time play of right of way signal start-up time of cable television channels program request, just packet start-up time of cable television channels program request is decoded and obtained the start-up time of the channel of each cable television channels and the audio frequency and video to program request that should cable television channels for the secondary server 3 of catv on demand, packet start-up time that the secondary server 4 of playing for right of way signal is just play right of way signal is decoded and is obtained the channel of each cable television channels and the start-up time to right of way signal broadcasting that should cable television channels,
Step 2: in the time that arrive in the start-up time of the audio frequency and video of the corresponding program request of each cable television channels, when just starting audio/video player and arrived in the start-up time of audio frequency and video that needs program request for the secondary server 3 of catv on demand, the corresponding video on demand of corresponding each cable television channels fdisk needs audio frame in the audio data stream of program request and needs the frame of video in the video data stream of program request to be written into the corresponding video on demand memory partitioning of the corresponding each cable television channels of video data stream that needs the audio data stream of program request and need program request according to the order from arriving first of reproduction time in batches, every batch is loaded into the audio frame of video on demand in the audio data stream that needs program request in memory partitioning and needs the frame of video in the video data stream of program request to be play continuously according to the taking out in turn from arriving first of reproduction time by audio/video player,
Step 3: in the time that arrive in the start-up time of the corresponding right of way signal of each cable television channels, the secondary server 4 of playing for right of way signal is written into the corresponding right of way signal broadcasting of the corresponding each cable television channels of the data flow memory partitioning of the right of way signal that needs program request in batches according to the order from arriving first of reproduction time with regard to the Frame that starts picture playing device and the corresponding right of way signal broadcasting of corresponding each cable television channels fdisk needs the right of way signal in the data flow of right of way signal of program request when arrived in the start-up time of right of way signal, every batch is loaded into the right of way signal broadcasting Frame of the right of way signal in the data flow of the right of way signal that needs program request in memory partitioning and is play continuously according to the taking out in turn from arriving first of reproduction time by picture playing device,
Step 4: in the time having wireless digital screen 8 need to show the request program of a cable television channels, according to the number series of the channel of this cable television channels, according to the order from high to low of this number series, press one by one the digital keys consistent with the number of this number series, the number series that all digital keys that are pressed are all converted into channel by key encoder 19 successively sends to the processor 12 in remote controller 9, processor 12 is forwarded to the number series of this channel on liquid crystal display screen 13 and shows, if the number series of this channel does not have error, press again the confirmation button 15 for selecting channel, processor 12 just can receive and press the signal that the button of the confirmation for selecting channel 15 sends like this, then the processor 12 of wireless digital screen 8 sends to wireless router 6 by the number series of the channel receiving through wireless network card 7, the master server 1 being sent to for digital screen Broadcast Control through broadcasting and TV cable broadband network 5 by wireless router 6 again,
Step 5: receive after the number series of channel for the master server 1 of digital screen Broadcast Control, the secondary server 4 of just playing to the secondary server 3 for catv on demand with for right of way signal by broadcasting and TV cable broadband network 5 sends the order request packet of the number series that includes channel;
Step 6: when the secondary server 3 for catv on demand receives after the order request packet of the number series that includes channel, just this order request packet that includes the number series of channel is decoded and obtained the channel that requires program request, the channel obtaining according to decoding derives its cable television channels, then when the video on demand corresponding with this cable television channels in the each taking-up of audio/video player is by the audio frame in memory partitioning and frame of video, just audio/video player is taken out to the video on demand corresponding with this cable television channels audio frame in memory partitioning and video frame synchronization for the secondary server 3 of catv on demand at every turn and carry out video compression, again the audio frame after video compression and frame of video are passed through to broadcasting and TV cable broadband network 5 successively, wireless router 6 and wireless network card 7 are delivered in the wireless digital screen 8 of number series of the channel that sends this cable television channels, wireless digital screen 8 shield and within wireless digital shields 8 designated play area, is carried out program request with driver 11 by wireless digital again after the audio frame after video compression and frame of video are decompressed,
Step 7: when the secondary server 4 of playing for right of way signal receives after the order request packet of the number series that includes channel, just this order request packet that includes the number series of channel is decoded and obtained the channel that requires program request, the channel obtaining according to decoding derives its cable television channels, then in the time that the each taking-up of the picture playing device right of way signal corresponding with this cable television channels play the Frame of the right of way signal in the data flow of using the right of way signal in memory partitioning, the secondary server 4 of playing for right of way signal just by video on demand corresponding with this cable television channels each picture playing device taking-up with the data-frame sync of the right of way signal of the data flow of the right of way signal in memory partitioning carry out picture compression, again the Frame of the right of way signal after picture compression is passed through to broadcasting and TV cable broadband network 5 successively, wireless router 6 and wireless network card 7 are delivered in the wireless digital screen 8 of number series of the channel that sends this cable television channels, after wireless digital screen 8 Frames by the right of way signal after picture compression decompress, shield and within wireless digital shields 8 appointment notice play area, carry out program request with driver 11 by wireless digital again.
In order to enhance productivity, the structure that the present invention adopts and method can simply realize and directly simulate really and select corresponding data flow to carry out real-time program request through the progress of player, so just can be effective.
Brief description of the drawings
Figure l is the syndeton schematic diagram of digital screen broadcast control system of the present invention.
Fig. 2 is the structural representation of remote controller of the present invention.
Embodiment
Below in conjunction with drawings and Examples, summary of the invention is described further:
Shown in seeing figures.1.and.2, digital screen VOD system, comprises the master server 1 for digital screen Broadcast Control that same broadcasting and TV cable broadband network 5 is connected, the secondary server 4 of playing for the secondary server 3 of catv on demand and for right of way signal, broadcasting and TV cable broadband network 5 is connected with wireless router 6, the same above wireless network card 7 phase wireless connections of wireless router 6, each wireless network card 7 is built in respectively in each self-corresponding wireless digital screen 8, the controller 10 of each wireless digital screen 8 is connected with driver 11 with wireless digital screen with wireless network card 7 separately, each wireless digital screen 8 disposes respectively adaptive separately remote controller 9, and described remote controller 9 outer walls are provided with liquid crystal display screen 13, by being 0 with Digital ID respectively, Digital ID is 1, Digital ID is 2, Digital ID is 3, Digital ID is 4, Digital ID is 5, Digital ID is 6, Digital ID is 7, Digital ID is 8, Digital ID is the digital keys group 14 of nine digital keys composition of 9 and for selecting the confirmation button 15 of channel, in described remote controller 9, be provided with processor 12, processor 12 is same for selecting the confirmation button 15 of channel and being 0 with Digital ID respectively by key encoder 19, Digital ID is 1, Digital ID is 2, Digital ID is 3, Digital ID is 4, Digital ID is 5, Digital ID is 6, Digital ID is 7, Digital ID is 8, Digital ID is that nine digital keys of 9 are connected, and liquid crystal display screen 13 is connected with the processor 12 of remote controller 9 interior settings, and such keyboard structure can direct convenience forms structure and the transmitting of channel fast.In the hard disk of the described secondary server 3 for catv on demand, be provided with the video on demand fdisk of same quantity by cable television channels quantity, the corresponding video on demand fdisk of each cable television channels, each video on demand is being deposited the audio data stream of the cable television channels required program request corresponding with it with fdisk and is being needed the video data stream of program request, need the audio frame in the audio data stream of program request to be arranged in order according to the order from arriving first of reproduction time, need the frame of video in the video data stream of program request to be arranged in order according to the order from arriving first of reproduction time, be provided with in addition the video on demand memory partitioning of same quantity by cable television channels quantity at the internal memory of the secondary server 3 for catv on demand, the corresponding video on demand memory partitioning of each cable television channels, in hard disk for the secondary server 3 of catv on demand, be also provided with audio/video player in addition, the secondary server 4 of playing for right of way signal is provided with the right of way signal broadcasting fdisk of same quantity by cable television channels quantity, the corresponding right of way signal broadcasting fdisk of each cable television channels, each fdisk is being deposited the data flow of the right of way signal of the cable television channels required program request corresponding with it, need the Frame of the right of way signal in the data flow of right of way signal of program request to be arranged in order according to the order from arriving first of reproduction time, be provided with in addition the right of way signal broadcasting memory partitioning of same quantity by cable television channels quantity at the internal memory of the secondary server 4 of playing for right of way signal, the corresponding right of way signal broadcasting memory partitioning of each cable television channels, in the hard disk of the secondary server 4 of playing for right of way signal in addition, be also provided with picture playing device, the rule of the order from arriving first like this, just can reduce the separator in the data flow of bulk redundancy, improve thus the efficiency of program request.
The order method of described digital screen VOD system, step is as follows:
Step 1: first start the master server 1 for digital screen Broadcast Control that same broadcasting and TV cable broadband network 5 is connected, the secondary server 4 of playing for the secondary server 3 of catv on demand and for right of way signal, then the secondary server 4 of playing to the secondary server 3 for catv on demand and for right of way signal respectively for the master server 1 of digital screen Broadcast Control sends the packet and packet start-up time play of right of way signal start-up time of cable television channels program request, packet start-up time of described cable television channels program request comprises the start-up time of the channel of each cable television channels and the audio frequency and video to program request that should cable television channels, the start-up time that packet start-up time that described right of way signal is play comprises the channel of each cable television channels and right of way signal that should cable television channels is play, if having received respectively the secondary server 4 of playing for right of way signal, the secondary server 4 of playing for the secondary server 3 of catv on demand with for right of way signal sends the packet and packet start-up time play of right of way signal start-up time of cable television channels program request, just packet start-up time of cable television channels program request is decoded and obtained the start-up time of the channel of each cable television channels and the audio frequency and video to program request that should cable television channels for the secondary server 3 of catv on demand, packet start-up time that the secondary server 4 of playing for right of way signal is just play right of way signal is decoded and is obtained the channel of each cable television channels and the start-up time to right of way signal broadcasting that should cable television channels,
Step 2: in the time that arrive in the start-up time of the audio frequency and video of the corresponding program request of each cable television channels, when just starting audio/video player and arrived in the start-up time of audio frequency and video that needs program request for the secondary server 3 of catv on demand, the corresponding video on demand of corresponding each cable television channels fdisk needs audio frame in the audio data stream of program request and needs the frame of video in the video data stream of program request to be written into the corresponding video on demand memory partitioning of the corresponding each cable television channels of video data stream that needs the audio data stream of program request and need program request according to the order from arriving first of reproduction time in batches, every batch is loaded into the audio frame of video on demand in the audio data stream that needs program request in memory partitioning and needs the frame of video in the video data stream of program request to be play continuously according to the taking out in turn from arriving first of reproduction time by audio/video player,
Step 3: in the time that arrive in the start-up time of the corresponding right of way signal of each cable television channels, the secondary server 4 of playing for right of way signal is written into the corresponding right of way signal broadcasting of the corresponding each cable television channels of the data flow memory partitioning of the right of way signal that needs program request in batches according to the order from arriving first of reproduction time with regard to the Frame that starts picture playing device and the corresponding right of way signal broadcasting of corresponding each cable television channels fdisk needs the right of way signal in the data flow of right of way signal of program request when arrived in the start-up time of right of way signal, every batch is loaded into the right of way signal broadcasting Frame of the right of way signal in the data flow of the right of way signal that needs program request in memory partitioning and is play continuously according to the taking out in turn from arriving first of reproduction time by picture playing device,
Step 4: in the time having wireless digital screen 8 need to show the request program of a cable television channels, according to the number series of the channel of this cable television channels, according to the order from high to low of this number series, press one by one the digital keys consistent with the number of this number series, the number series that all digital keys that are pressed are all converted into channel by key encoder 19 successively sends to the processor 12 in remote controller 9, processor 12 is forwarded to the number series of this channel on liquid crystal display screen 13 and shows, if the number series of this channel does not have error, press again the confirmation button 15 for selecting channel, processor 12 just can receive and press the signal that the button of the confirmation for selecting channel 15 sends like this, then the processor 12 of wireless digital screen 8 sends to wireless router 6 by the number series of the channel receiving through wireless network card 7, the master server 1 being sent to for digital screen Broadcast Control through broadcasting and TV cable broadband network 5 by wireless router 6 again,
Step 5: receive after the number series of channel for the master server 1 of digital screen Broadcast Control, the secondary server 4 of just playing to the secondary server 3 for catv on demand with for right of way signal by broadcasting and TV cable broadband network 5 sends the order request packet of the number series that includes channel;
Step 6: when the secondary server 3 for catv on demand receives after the order request packet of the number series that includes channel, just this order request packet that includes the number series of channel is decoded and obtained the channel that requires program request, the channel obtaining according to decoding derives its cable television channels, then when the video on demand corresponding with this cable television channels in the each taking-up of audio/video player is by the audio frame in memory partitioning and frame of video, just audio/video player is taken out to the video on demand corresponding with this cable television channels audio frame in memory partitioning and video frame synchronization for the secondary server 3 of catv on demand at every turn and carry out video compression, again the audio frame after video compression and frame of video are passed through to broadcasting and TV cable broadband network 5 successively, wireless router 6 and wireless network card 7 are delivered in the wireless digital screen 8 of number series of the channel that sends this cable television channels, wireless digital screen 8 shield and within wireless digital shields 8 designated play area, is carried out program request with driver 11 by wireless digital again after the audio frame after video compression and frame of video are decompressed,
Step 7: when the secondary server 4 of playing for right of way signal receives after the order request packet of the number series that includes channel, just this order request packet that includes the number series of channel is decoded and obtained the channel that requires program request, the channel obtaining according to decoding derives its cable television channels, then in the time that the each taking-up of the picture playing device right of way signal corresponding with this cable television channels play the Frame of the right of way signal in the data flow of using the right of way signal in memory partitioning, the secondary server 4 of playing for right of way signal just by video on demand corresponding with this cable television channels each picture playing device taking-up with the data-frame sync of the right of way signal of the data flow of the right of way signal in memory partitioning carry out picture compression, again the Frame of the right of way signal after picture compression is passed through to broadcasting and TV cable broadband network 5 successively, wireless router 6 and wireless network card 7 are delivered in the wireless digital screen 8 of number series of the channel that sends this cable television channels, after wireless digital screen 8 Frames by the right of way signal after picture compression decompress, shield and within wireless digital shields 8 appointment notice play area, carry out program request with driver 11 by wireless digital again, such method only need to be carried out according to original order, needn't cause because of mixed and disorderly discharge the inefficiency of data stream transmitting.
The above, it is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, although the present invention discloses as above with preferred embodiment, but not in order to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, when can utilizing the technology contents of above-mentioned announcement to make a little change or being modified to the equivalent embodiment of equivalent variations, in every case be not depart from technical solution of the present invention content, according to technical spirit of the present invention, within the spirit and principles in the present invention, the any simple amendment that above embodiment is done, be equal to replacement and improvement etc., within all still belonging to the protection range of technical solution of the present invention.
Claims (3)
1. a digital screen VOD system, is characterized in that the master server for digital screen Broadcast Control (1) that comprises that same broadcasting and TV cable broadband network (5) is connected, the secondary server (4) of playing for the secondary server (3) of catv on demand and for right of way signal, the same wireless router of broadcasting and TV cable broadband network (5) (6) is connected, same above wireless network card (7) the phase wireless connections of wireless router (6), each wireless network card (7) is built in respectively in each self-corresponding wireless digital screen (8), the controller (10) of each wireless digital screen (8) is connected with driver (11) with wireless digital screen with wireless network card (7) separately, each wireless digital screen (8) disposes respectively adaptive separately remote controller (9), and described remote controller (9) outer wall is provided with liquid crystal display screen (13), by being 0 with Digital ID respectively, Digital ID is 1, Digital ID is 2, Digital ID is 3, Digital ID is 4, Digital ID is 5, Digital ID is 6, Digital ID is 7, Digital ID is 8, Digital ID is the digital keys group (14) of nine digital keys composition of 9 and for selecting the confirmation button (15) of channel, in described remote controller (9), be provided with processor (12), processor (12) is same for selecting the confirmation button (15) of channel and being 0 with Digital ID respectively by key encoder (19), Digital ID is 1, Digital ID is 2, Digital ID is 3, Digital ID is 4, Digital ID is 5, Digital ID is 6, Digital ID is 7, Digital ID is 8, Digital ID is that nine digital keys of 9 are connected, and the processor (12) arranging in the same remote controller of liquid crystal display screen (13) (9) is connected.
2. digital screen VOD system according to claim 1, it is characterized in that the interior video on demand fdisk that is provided with same quantity by cable television channels quantity of hard disk of the described secondary server for catv on demand (3), the corresponding video on demand fdisk of each cable television channels, each video on demand is being deposited the audio data stream of the cable television channels required program request corresponding with it with fdisk and is being needed the video data stream of program request, need the audio frame in the audio data stream of program request to be arranged in order according to the order from arriving first of reproduction time, need the frame of video in the video data stream of program request to be arranged in order according to the order from arriving first of reproduction time, be provided with in addition the video on demand memory partitioning of same quantity by cable television channels quantity at the internal memory of the secondary server for catv on demand (3), the corresponding video on demand memory partitioning of each cable television channels, in hard disk for the secondary server 3 of catv on demand, be also provided with audio/video player in addition, the secondary server (4) of playing for right of way signal is provided with the right of way signal broadcasting fdisk of same quantity by cable television channels quantity, the corresponding right of way signal broadcasting fdisk of each cable television channels, each fdisk is being deposited the data flow of the right of way signal of the cable television channels required program request corresponding with it, need the Frame of the right of way signal in the data flow of right of way signal of program request to be arranged in order according to the order from arriving first of reproduction time, be provided with in addition the right of way signal broadcasting memory partitioning of same quantity by cable television channels quantity at the internal memory of the secondary server (4) of playing for right of way signal, the corresponding right of way signal broadcasting memory partitioning of each cable television channels, in the hard disk of the secondary server 4 of playing for right of way signal in addition, be also provided with picture playing device.
3. the order method of digital screen VOD system according to claim 2, is characterized in that, step is as follows:
Step 1: first start the master server for digital screen Broadcast Control (1) that same broadcasting and TV cable broadband network (5) is connected, the secondary server (4) of playing for the secondary server (3) of catv on demand and for right of way signal, then the secondary server (4) of playing to the secondary server for catv on demand (3) and for right of way signal respectively for the master server (1) of digital screen Broadcast Control sends the packet and packet start-up time play of right of way signal start-up time of cable television channels program request, packet start-up time of described cable television channels program request comprises the start-up time of the channel of each cable television channels and the audio frequency and video to program request that should cable television channels, the start-up time that packet start-up time that described right of way signal is play comprises the channel of each cable television channels and right of way signal that should cable television channels is play, the secondary server (4) of playing for the secondary server (3) of catv on demand with for right of way signal is if received respectively the secondary server (4) of playing for right of way signal and sent the packet and packet start-up time play of right of way signal start-up time of cable television channels program request, just packet start-up time of cable television channels program request is decoded and obtained the start-up time of the channel of each cable television channels and the audio frequency and video to program request that should cable television channels for the secondary server (3) of catv on demand, packet start-up time that the secondary server (4) of playing for right of way signal is just play right of way signal is decoded and is obtained the channel of each cable television channels and the start-up time to right of way signal broadcasting that should cable television channels,
Step 2: in the time that arrive in the start-up time of the audio frequency and video of the corresponding program request of each cable television channels, when just starting audio/video player and arrived in the start-up time of audio frequency and video that needs program request for the secondary server (3) of catv on demand, the corresponding video on demand of corresponding each cable television channels fdisk needs audio frame in the audio data stream of program request and needs the frame of video in the video data stream of program request to be written into the corresponding video on demand memory partitioning of the corresponding each cable television channels of video data stream that needs the audio data stream of program request and need program request according to the order from arriving first of reproduction time in batches, every batch is loaded into the audio frame of video on demand in the audio data stream that needs program request in memory partitioning and needs the frame of video in the video data stream of program request to be play continuously according to the taking out in turn from arriving first of reproduction time by audio/video player,
Step 3: in the time that arrive in the start-up time of the corresponding right of way signal of each cable television channels, the secondary server (4) of playing for right of way signal is written into the corresponding right of way signal broadcasting of the corresponding each cable television channels of the data flow memory partitioning of the right of way signal that needs program request in batches according to the order from arriving first of reproduction time with regard to the Frame that starts picture playing device and the corresponding right of way signal broadcasting of corresponding each cable television channels fdisk needs the right of way signal in the data flow of right of way signal of program request when arrived in the start-up time of right of way signal, every batch is loaded into the right of way signal broadcasting Frame of the right of way signal in the data flow of the right of way signal that needs program request in memory partitioning and is play continuously according to the taking out in turn from arriving first of reproduction time by picture playing device,
Step 4: in the time having wireless digital screen (8) need to show the request program of a cable television channels, according to the number series of the channel of this cable television channels, according to the order from high to low of this number series, press one by one the digital keys consistent with the number of this number series, the number series that all digital keys that are pressed are all converted into channel by key encoder (19) successively sends to the processor (12) in remote controller (9), the number series of this channel is forwarded to the upper demonstration of liquid crystal display screen (13) by processor (12), if the number series of this channel does not have error, press again the confirmation button (15) for selecting channel, processor (12) just can receive and press the signal that the button of the confirmation for selecting channel (15) sends like this, then the processor (12) of wireless digital screen (8) sends to wireless router (6) by the number series of the channel receiving through wireless network card (7), send to the master server (1) for digital screen Broadcast Control by wireless router (6) through broadcasting and TV cable broadband networks (5) again,
Step 5: the master server (1) for digital screen Broadcast Control receives after the number series of channel, the secondary server (4) of just playing to the secondary server for catv on demand (3) with for right of way signal by broadcasting and TV cable broadband network (5) sends the order request packet of the number series that includes channel;
Step 6: when the secondary server for catv on demand (3) receives after the order request packet of the number series that includes channel, just this order request packet that includes the number series of channel is decoded and obtained the channel that requires program request, the channel obtaining according to decoding derives its cable television channels, then when the video on demand corresponding with this cable television channels in the each taking-up of audio/video player is by the audio frame in memory partitioning and frame of video, just audio/video player is taken out to the video on demand corresponding with this cable television channels audio frame in memory partitioning and video frame synchronization for the secondary server (3) of catv on demand at every turn and carry out video compression, again the audio frame after video compression and frame of video are passed through to broadcasting and TV cable broadband network (5) successively, wireless router (6) and wireless network card (7) are delivered in the wireless digital screen (8) of number series of the channel that sends this cable television channels, wireless digital screen (8) shield and within wireless digital shields the designated play area of (8), is carried out program request with driver (11) by wireless digital again after the audio frame after video compression and frame of video are decompressed,
Step 7: when the secondary server (4) of playing for right of way signal receives after the order request packet of the number series that includes channel, just this order request packet that includes the number series of channel is decoded and obtained the channel that requires program request, the channel obtaining according to decoding derives its cable television channels, then in the time that the each taking-up of the picture playing device right of way signal corresponding with this cable television channels play the Frame of the right of way signal in the data flow of using the right of way signal in memory partitioning, the secondary server (4) of playing for right of way signal just by video on demand corresponding with this cable television channels each picture playing device taking-up with the data-frame sync of the right of way signal of the data flow of the right of way signal in memory partitioning carry out picture compression, again the Frame of the right of way signal after picture compression is passed through to broadcasting and TV cable broadband network (5) successively, wireless router (6) and wireless network card (7) are delivered in the wireless digital screen (8) of number series of the channel that sends this cable television channels, wireless digital screen (8) shield and within wireless digital shields the appointment notice play area of (8), is carried out program request with driver (11) by wireless digital again after the Frame of the right of way signal after picture compression is decompressed.
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