CN1404302A - TV program making system and method with double-bit rate video stream - Google Patents
TV program making system and method with double-bit rate video stream Download PDFInfo
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Abstract
The present invention provides a video signal processing system to use dual code rate video stream to process the video signal, which processes the playing and recording machine of broadcasting video signal stream. It collects the video signal stream broadcasted by the playing-recording machine and divide the video signal stream into data collecting work stations of high code rate video data and low code rate data, to store the high and low code rate video data from the data collecting work stations into the video data storing device of storing sections in high code rate video data and low code rate video data separately, to pick up the low code rate video data from low code rate video data storing section in video and to edit them for creating the edition working station of data edition information list.
Description
Technical field
The present invention relates to a kind of system and method that uses double-bit rate video stream to produce TV shows, particularly by generating the video flowing of high and low two kinds of code checks, editor's low bit-rate video material is also play the system and method that produces TV shows with high code check.
Background technology
In the past, the teletrician adopted traditional linear editing method based on the material tape that TV programme is edited.It is low that this method exists efficient, and special effects is simple, and visual format is abundant, and the material tape damages easily, degradation problem under the image quality is duplicated in breaking-up, many editions.Along with development of computer, material to be reprinted the memory device of computer from tape, the non-linear editing equipment of depositing with data mode is generally using.This non-linear editing equipment has solved the problem of traditional edit mode.
Say that briefly non-linear editing equipment has the following advantages: 1) material is stored with data mode, the addressing because the magnetic head of hard disk can jump just can be found the material of storage immediately, and its access time is accelerated greatly; 2) image processing, graphics process instrument can make picture active more lively by the computer powerful operation capacity; 3) reproduction process of material is the data reproduction processes, and this process can't harm, and can not cause image quality to descend; 4) can more easily realize the management and the inquiry of material by the function of search of database.
Though non-linear editing equipment has above-mentioned advantage, it also has disadvantageous aspect.For example, its required resource consumption is very big.For the pal television of China, when not comprising audio frequency, the data volume in a second is 165Mbit.This data volume is very big.If one hour program has the data of 74G byte, for the non-linear editing equipment that this adopted will spend a large amount of investments.Though the cost in the time of can using video compression technology to make program storage reduces a lot, the decline that compression always brings program quality.Therefore, guarantee program quality, compression is not hard-core, in the program making link, adopts the MPEG2 compression of the highest IBP form of at present popular compression ratio, and data volume also will be about per second 10Mbit.Under such situation, it is surprising that the video data volume remains.
From resource-sharing and the angle being convenient to manage, present TV station adopts the mode of networking, and the non-linear editing computer of making link is coupled together with network.Behind storage device, other work stations can be shared video material by network to video material from a work station data acquisition.The greatest problem of this application is exactly that the video data volume is too big, transmits video material and need take more bandwidth.General 10Base-T, 100Base-T Ethernet even gigabit Ethernet all can not satisfy this application.Therefore, present TV station makes network and all adopts optical-fibre channel, and latticed form is subzone network (SAN) structure.Adopt based on network TV programme editor is carried out.Yet this needs a large amount of investments.In addition, because the editing saving personnel must use these expensive auxiliary equipment (optical-fibre channel, SAN memory bank) to work, also limited their working method.
Below in conjunction with Fig. 1 the general making net based on solid size rate material at present is described.As seen from Figure 1, vision signal is sent to data collection task station 12 from player-recorder 11, sends it to video data storage device 13 after the 12 pairs of vision signals in data collection task station are compressed.Editing station 15 (15-1 ..., 15-N) extract required video data and be sent to special-purpose editing machine (not shown) from video data storage device 13 by network link vision signal is edited.Vision signal behind the editor is delivered to video data storage device 13 through editing station 15 again.Synthetic work station 14 downloads to player-recorder for later broadcast after synthesizing final program from the vision signal through editor of video data storage device 13.Because existing television program designing net adopts the video data of single code check, and the data volume of high-quality vision signal is very big, transmit vision signal and will take massive band width, must all use fiber channel network to connect between the work station and could satisfy its bandwidth needs.In addition, because the editing station all is a high code rate data of directly editing big data quantity, the special-purpose editing machine of high-performance that must have the support of hardware integrated circuit board could be competent at, and has so just caused costing an arm and a leg of network and special equipment, needs great amount of investment.
Summary of the invention
In view of the above problems, the invention provides a kind of video signal processing system that uses double-bit rate video stream technical finesse vision signal, this video signal processing system can flow the strict related high-quality vision signal of playing with low code check editing video stream and by video flowing after will editing and high bit-rate video.
In addition, the present invention also provides a kind of video signal processing method that uses double-bit rate video stream technical finesse vision signal, and this method can flow the strict related high-quality vision signal of playing with low code check editing video stream and by video flowing after will editing and high bit-rate video.
According to an aspect of the present invention, provide a kind of video signal processing system that uses double-bit rate video stream to handle vision signal, this video signal system is handled and is comprised: the player-recorder of broadcast video signal stream; Video signal flow that the collection player-recorder is play and the data collection task station that video signal flow is divided into high bit-rate video data and low bit-rate video data; The video data storage device that high bit-rate video data and low bit-rate video data from the data collection task station are stored in high bit-rate video data storage area and low bit-rate video data storage area respectively; Extract the editing station that data edition information table (EDL) was edited and generated to the low bit-rate video data from the low bit-rate video data storage area of video data storage device; According to the data edition information table that generates the low bit-rate video data transaction through editor is become to be mutually related, frame by frame the synthetic work station of the high bit-rate video data of precision correspondence.
In addition, the data collection task station further comprise storage of collected video data stream each frame picture buffer and the frame picture of storage duplicated so that obtain reproducing unit with the identical frame picture of raw frames.
In addition, the data collection task station further comprise to one road frame picture streams compress and encode with generate code check be 8Mbps to 50Mbps high bit-rate video data flow high code check compressor reducer and another road frame picture streams is compressed and encode with the generation code check is the low code check compressor reducer of the low bit-rate video data flow of 100Kbps to 1.5Mbps.
According to another aspect of the present invention, provide a kind of video signal processing method that uses double-bit rate video stream to handle vision signal, the method comprising the steps of: broadcast video signal stream; Gather the video signal flow of broadcast and video signal flow is divided into high bit-rate video data and low bit-rate video data; High bit-rate video data and low bit-rate video data are stored in high bit-rate video data storage area and low bit-rate video data storage area respectively; Extract the low bit-rate video data from the low bit-rate video data storage area and edit and generate data edition information table (EDL); According to the data edition information table that generates the low bit-rate video data transaction through editor is become to be mutually related, frame by frame the high bit-rate video data of precision correspondence.
In addition, data acquisition step further comprise storage of collected video data stream each frame picture and to the storage the frame picture duplicate so that obtain the step of identical two-way frame picture.
In addition, data acquisition step comprises that further one road frame picture streams is compressed and encoded to generate the high bit-rate video data flow that code check is 8Mbps to 50Mbps and another road frame picture streams is compressed and encoded to generate code check is the step of the low bit-rate video data flow of 100Kbps to 1.5Mbps.
Handle the system and method for vision signal based on use double-bit rate video stream of the present invention, in the manufacturing process of TV programme, because transmission low bit-rate video stream between editing station and the video data storage device, saved the required bandwidth of transfer of data, therefore be the optical-fibre channel except being connected between data collection task station and synthetic work station and the video data storage device, other editing stations all are that common Ethernet connects, and do not need expensive network assistance equipment, not only can save a large amount of network investments, and general Ethernet can reduce maintenance cost greatly.In addition, what meet editor is the low code rate data of low data bulk because editing is stood erectly, and ordinary PC just can be finished the work, and no longer needs expensive specialised hardware support.
Description of drawings
Can more be expressly understood characteristic of the present invention and advantage by describing embodiments of the invention in detail below in conjunction with accompanying drawing.
Fig. 1 is the block diagram that comes the system of processing video data according to prior art based on solid size rate video data stream;
Fig. 2 adopts dicode rate video data stream to come the block diagram of the system of processing video data according to the embodiment of the invention;
Fig. 3 is the schematic block diagram that is generated high and low dicode rate video data stream according to the embodiment of the invention by the data collection task station;
Fig. 4 is the schematic block diagram that produces TV shows based on dicode rate video data stream according to the embodiment of the invention;
Fig. 5 adopts dicode rate video data stream to come the workflow diagram of the system of processing video data according to the embodiment of the invention.
Embodiment
Adopt dicode rate video data stream to come the block diagram of the system of processing video data below with reference to Fig. 2 and 3 explanations according to the embodiment of the invention.Vision signal outputs to data collection task station 22 from the player-recorder 21 such as magnetic tape station, DV video camera, VCD/DVD machine by the connecting line as S terminal, CVBS (composite signal), YUV (component signal) or SDI (digital signal) and so on.In data collection task station 22, (for PAL is 720 * 576 * 25fps (frames per second) according to the video formats standard by the video data acquiring card, for NTSC is 720 * 480 * 29.9fps) and the acquisition parameter set, with the video data stream of certain speed acquisition output, and video data stream become the digital video frame picture streams.
Each frame picture of the digital video frame picture streams that frame picture buffer 221 storage of collected in the data collection task station 22 arrive.Frame picture reproducing unit 222 duplicates the digital video frame picture of storage, so that obtain and the identical frame picture copy of raw frames, thereby form the identical two-way frame picture streams of content together with former frame picture streams, to guarantee to be sent to the frame picture streams strict correlation in terms of content of video compressor.In the two-way frame picture streams that obtains a road is sent to high bit-rate video compressor reducer 223 such as MPEG2, DV or MJPEG encoder compresses and encode, generate the high bit-rate video data flow of the high picture quality of code check between 8Mbps～50Mbps.Low bit-rate video compressor reducer 224 such as MPEG4, MPEG1, WindowsMedia or Real Media encoder is sent on another road in the two-way frame picture streams compresses and encode, generate the low bit-rate video data flow of the general image quality of code check between 100Kbps～1.5Mbps.High bit-rate video compressor reducer 223 and low bit-rate video compressor reducer 224 are all gathered clock speed with video data stream and are kept synchronously, with the frame picture streams strict correlation in time that guarantees to be generated.
The high code check and the low bit-rate video data flow of the two-way correspondence that is generated write video data storage device 23 respectively.Comprise high bit-rate video data flow memory block and low bit-rate video data flow memory block in the video data storage device 23.High bit-rate video data flow is preserved in high bit-rate video data flow memory block, and the low bit-rate video data flow is preserved in low bit-rate video data flow memory block.As can be seen from Figure 3, since video flowing frame picture be through data acquisition behind computer, deliver to and duplicate before the video compressor compression, according to the non-destructive of digital copy on the computer as can be known, duplicate the frame picture streams that obtains and former frame picture with identical, thereby guaranteed after compressing respectively the strict relevance of the video data stream of the different code checks that generated.
Editing station 25 (25-1,, 25-N) extract required low bit-rate video data from the low bit-rate video data flow memory block of video data storage device 23, and the low bit-rate video data be sent to editing station 25 (25-1 by common Ethernet by network link,, 25-N).Editing station 25 is sent to the ordinary PC (not shown) to the low bit-rate video data vision signal is edited.
With reference to figure 4 process of carrying out television program designing based on the double-bit rate video stream technology is described.In the program making process, operating personnel call the low bit-rate video data at editing station 25 from network and browse, edit, and edit file is generated editing saving information table (EDL).The editing saving information table contains all content of operation at video data stream, for example which time point to carry out which kind of operation (shearing, stunt) or the like at.After program making finishes, when in the end generating broadcast items, the low bit-rate video data are replaced to the high bit-rate video data that strict relevance is arranged one to one with it at synthetic work station 24.According to the description of editing saving information table, synthetic final program, and then download to player-recorder 21 or broadcasting server is used for broadcasting.Because used the high bit-rate video data of high picture quality this moment, program quality is guaranteed.
The course of work from above is appreciated that, except needing optical-fibre channel (FC) is connected because of high bit-rate video data transmit between data collection task station 22 and synthetic work station 23 and the video data storage device 23, because of what transmit between other editing stations and the video data storage device 23 is the low bit-rate video data, so all be that common Ethernet connects between them, and can edit video data with ordinary PC, and do not need expensive network assistance equipment, not only can save a large amount of network investments, and general Ethernet can reduce maintenance cost greatly.In addition, because the synthetic work station is connected by optical-fibre channel (FC) with video data storage device 23, therefore can satisfy the requirement of high bandwidth fully.
Adopt dicode rate video data stream to come the workflow diagram of the system of processing video data below with reference to Fig. 5 explanation according to the embodiment of the invention.At first, at step S51, flow to data collection task station 22 broadcast video signals by connecting line from player-recorder 21.At step S52, the video signal flow of playing is gathered at data collection task station 22.At step S53, each frame picture of the video data stream of frame picture buffer 221 storage of collected in the data collection task station 22, the frame picture of 222 pairs of storages of frame reproducing unit duplicate so that obtain identical two-way frame picture.At step S54, video signal flow is divided into high bit-rate video data and low bit-rate video data.At step S55,223 pairs one road frame picture streams of high bit-rate video compressor reducer are compressed and encoded to generate code check is the high bit-rate video data flow of 8Mbps to 50Mbps, and low bit-rate video compressor reducer 224 compresses another road frame picture streams and encodes to generate code check is the low bit-rate video data flow of 100Kbps to 1.5Mbps.At step S56, high bit-rate video data and low bit-rate video data are stored in the high bit-rate video data storage area and the low bit-rate video data storage area of video data storage device 23 respectively.At step S57, editing station 25 is extracted the low bit-rate video data and is edited and generate data edition information table (EDL) from the low bit-rate video data storage area.At step S58, synthetic work station 24 becomes to be mutually related the low bit-rate video data transaction through editor according to the data edition information table that generates, frame by frame the high bit-rate video data of precision correspondence.
Specific implementation process of the present invention so far has been described in conjunction with the embodiments.Be appreciated that under the situation of the spirit and scope that do not break away from following claim scope and can make amendment and improve the present invention.
Claims (6)
1. video signal processing system that uses double-bit rate video stream to handle vision signal, this video signal processing system comprises:
The player-recorder (21) of broadcast video signal stream;
Video signal flow that the collection player-recorder is play and the data collection task station (22) that video signal flow is divided into high bit-rate video data and low bit-rate video data;
The video data storage device (23) that high bit-rate video data and low bit-rate video data from the data collection task station are stored in high bit-rate video data storage area and low bit-rate video data storage area respectively;
Extract the editing station (25) that data edition information table (EDL) was edited and generated to the low bit-rate video data from the low bit-rate video data storage area of video data storage device;
According to the data edition information table that generates the low bit-rate video data transaction through editor is become to be mutually related, frame by frame the synthetic work station (24) of the high bit-rate video data of precision correspondence.
2. use double-bit rate video stream according to claim 1 is handled the video signal processing system of vision signal, it is characterized in that described data collection task station (22) further comprise storage of collected video data stream each frame picture buffer (221) and the frame picture of storage duplicated so that obtain reproducing unit (222) with the identical frame picture of raw frames.
3. use double-bit rate video stream according to claim 1 and 2 is handled the video signal processing system of vision signal, it is characterized in that described data collection task station (22) further comprise to one road frame picture streams compress and encode with generate code check be 8Mbps to 50Mbps high bit-rate video data flow high bit-rate video compressor reducer (223) and another road frame picture streams is compressed and encode with the generation code check is the low code check compressor reducer (224) of the low bit-rate video data flow of 100Kbps to 1.5Mbps.
4. video signal processing method that uses double-bit rate video stream to handle vision signal, the method comprising the steps of:
Broadcast video signal stream;
Gather the video signal flow of broadcast and video signal flow is divided into high bit-rate video data and low bit-rate video data;
High bit-rate video data and low bit-rate video data are stored in high bit-rate video data storage area and low bit-rate video data storage area respectively;
Extract the low bit-rate video data from the low bit-rate video data storage area and edit and generate data edition information table (EDL);
According to the data edition information table that generates the low bit-rate video data transaction through editor is become to be mutually related, frame by frame the high bit-rate video data of precision correspondence.
5. use double-bit rate video stream according to claim 4 is handled the video signal processing method of vision signal, it is characterized in that data acquisition step further comprise storage of collected video data stream each frame picture and to the storage the frame picture duplicate so that obtain the step of identical two-way frame picture.
6. handle the video signal processing method of vision signals according to claim 4 or 5 described use double-bit rate video streams, it is characterized in that data acquisition step comprises that further one road frame picture streams is compressed and encoded to generate the high bit-rate video data flow that code check is 8Mbps to 50Mbps and another road frame picture streams is compressed and encoded to generate code check is the step of the low bit-rate video data flow of 100Kbps to 1.5Mbps.
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| CN102238373A (en) * | 2010-04-20 | 2011-11-09 | 上海精视信息技术有限责任公司 | Television program transmission system based on broadband mobile communication technology and working method thereof |
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| CN113453021A (en) * | 2021-03-24 | 2021-09-28 | 北京国际云转播科技有限公司 | Artificial intelligence broadcasting guide method, system, server and computer readable storage medium |
| CN113453021B (en) * | 2021-03-24 | 2022-04-29 | 北京国际云转播科技有限公司 | Artificial intelligence broadcasting guide method, system, server and computer readable storage medium |
| CN113453086A (en) * | 2021-03-29 | 2021-09-28 | 北京国际云转播科技有限公司 | Multi-machine-position synchronous cloud broadcasting guiding method, system, storage medium and video encoder |
| CN113271313A (en) * | 2021-04-20 | 2021-08-17 | 北京国际云转播科技有限公司 | Cloud director system, scheduling method, storage medium and multimedia scheduling server |
| CN113411647A (en) * | 2021-04-20 | 2021-09-17 | 北京国际云转播科技有限公司 | Cloud director method, system, server and computer readable storage medium |
| CN113411640A (en) * | 2021-04-21 | 2021-09-17 | 北京国际云转播科技有限公司 | Video encoder, cloud relay method, server, system and storage medium |
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