CN1144425C - Multichannel real-time TV program acquisition and memory system for community wibeband network - Google Patents
Multichannel real-time TV program acquisition and memory system for community wibeband network Download PDFInfo
- Publication number
- CN1144425C CN1144425C CNB011294426A CN01129442A CN1144425C CN 1144425 C CN1144425 C CN 1144425C CN B011294426 A CNB011294426 A CN B011294426A CN 01129442 A CN01129442 A CN 01129442A CN 1144425 C CN1144425 C CN 1144425C
- Authority
- CN
- China
- Prior art keywords
- video
- acquisition
- community
- memory system
- multichannel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000013139 quantization Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
Images
Landscapes
- Television Signal Processing For Recording (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The present invention relates to an acquisition and memory system of multichannel real-time TV programs for a community broadband network. The present invention is characterized in that an acquisition part comprises an all-channel TV tuner of CATV signals; all video input signals outputted by multiple channels are transferred to a pretreater by an input interface; finally, the signals enter a digital signal processor of a host; a memory part comprises a high-speed CPU and a high-speed hard disk. The present invention can realize the acquisition and the memory of multichannel real-time TV programs in a community broadband network for widely satisfying the requirements of users.
Description
The invention belongs to radio and television and broadband network application, specially refer to when in the community broad band network, requesting from a TV station, the multichannel TV programme is gathered in real time the system of storage.
The high speed development of the computer and the communication technology is just profoundly changing our life, has produced a kind of so emerging audio-visual aids of video request program VOD (VIDEO ON DEMAND).
It is a kind of audiovisual service according to the demand assignment video bandwidth that video request program VOD understands from literal meaning.Its transmission means is: program source-transmission network-spectators.Program in program source is traditional TV programme, and transmission network is when being the community broad band net, and such video request program just is called the video on demand based on the community broad band network, perhaps abbreviates the video on demand of VOD mode as.
The video on demand of VOD mode and traditional tv are propagated in essence different.Be mainly reflected in the following aspects:
1, program storage and broadcast mode are different.The traditional tv program storage is broadcasted according to the order that editor prearranges on traditional sucrose.The VOD program storage is broadcasted according to the requirement of spectators' program request on the hard disk of server, and can F.F., rewind down or stop at any time.
2, transmission means is different.The traditional tv program is unidirectional delivery information in network, and the amount of information of transmitting is less relatively.VOD is bi-directional information in network, and the amount of information of transmitting is relatively large.
3, spectators' initiative is different.Spectators watch that ordinary tv programme can only watch according to the listing that TV station weaves, and are comparatively passive.When spectators watch the VOD program, can arbitrarily arrange the time of watching and watch content, comparatively initiatively according to the needs of oneself.
VOD also is different from video tape recorder and VCD machine.It is the broadband audiovisual service that is based upon on the computer network basis, and the difference that can respond hundreds of even several thousand users is broadcasted requirement, can be provided several thousand programs to select for the user.
One of key technology of the video on demand of VOD mode is that TV programme is collected from CATV, carries out digitlization, is stored on the server then.In community, CATV often has 30-40 television channel, so the video on demand of community broad band network often needs to gather tens channel TV programs.
The multichannel real-time television programme acquisition storage system that the present invention works out is a kind of brand-new, practical technology, it collects the TV signal of a plurality of channels (2-128 channel) of CATV simultaneously, simultaneously signal is carried out digitlization, be stored on the server simultaneously then.
In field of broadcast televisions, monophonicly look, audio collecting system has been quite ripe.But concerning community's life, it is too dull that the TV programme of a channel seems, the collection of single channel TV programme does not have the practical application meaning.When requiring to gather the TV programme of tens channels, iff with tens monophonicly look, the audio collection card is superimposed use simply, though also can constitute a cover multichannel real-time television programme acquisition system, but, such system often can not be synchronous because of bulky, with high costs, many computer supports of needs, many people of needs operation, video and audio frequency, in fact can not use in community's life.So, the video on demand of VOD mode does not also appear in the practical application of community broad band network.
Purpose of the present invention, be for overcome in the prior art or can only realize monophonicly looking, audio collection, perhaps need be with support, the complicated operations of huge volume, expensive cost, multimachine, look many shortcomings such as the asynchronous multichannel that be cost could realize of audio frequency is looked, audio collection, and redesigned fully a kind of compact conformation, unit support, easy to operate, look the complete synchronous multichannel real-time television programme acquisition storage system of audio frequency.
The objective of the invention is to rely on following technical proposals to realize, a kind of multichannel real-time television programme acquisition storage system that is used for the community broad band network, it is characterized in that, 1, acquisition system, the all-channel tv tuner that comprises a cable TV CATV signal, it sends into video pre-processor with each video input signals of multiplexer channel output by input interface, the signal of handling one tunnel enters video Cache FIFO, be connected to synchronous clock generator and audio input interface, enter the digital signal processor of main frame again by audio frequency Cache FIFO, another road signal of handling through video pre-processor enters video encoder, and enter digital signal processor, be connected to USB/peripheral hardware control interface USB/PCI controller; 2, storage system comprises for the code stream of multichannel collection and storing simultaneously, requires to be configured with the storage speed of several times (2-128).
Since the multi-channel digital TV signal be converted into VOD directly the stream file of program request store simultaneously, special requirement is arranged, between the about 300K-2M of code stream for the single channel collection, and store simultaneously for the code stream that multichannel (2-128 road) is gathered, just require single channel to be several times as much as the storage speed of (2-128), this just requires configuration packet to draw together PIII 700M at high-speed CPU interior and more than the PIII 700M and comprise high speed hard-disks 7200 revolutions per seconds and more than 7200 revolutions per seconds, so as to be converted into VOD directly the stream file of program request store on the hard disk apace.
The good effect of this programme is, provide the collection and the storage of multichannel real-time television program, in the community broad band net, according to each user's needs, at any time that program request is liked or missed for some reason or wish once to concentrate each programs such as playing many collection TV play, realize interactive television.Extensively to satisfy user's need.
Further specify embodiment below in conjunction with accompanying drawing
Description of drawings
Fig. 1 is a community broad band net multi channel TV program VOD system structured flowchart
Fig. 2 is a multichannel real-time television programme acquisition system architecture diagram
Fig. 3 is for this acquisition system is looked, the audio sync schematic diagram
Fig. 4 is one of embodiment, based on one of system schema of general-purpose serial bus USB interface
Fig. 5 is two of embodiment, based on the system schema of peripheral hardware control interface pci bus
Fig. 6 is three of embodiment, two of USB interface-based system schema
Among the figure, vision signal is by 1 output of CATV all-channel tv tuner, different TV programme enter into audio frequency and video input device 2 respectively, this device comprises video input interface 2.1, video pre-processor 2.2 and video Cache FIFO 2.3, treated vision signal one tunnel is carried out signal Synchronization through synchronous clock generator 3, afterwards, enter audio input interface 4, enter CPU master controller 7 through audio frequency Cache FIFO 8 again, and be connected to USB/PCI controller 9, another road of treated vision signal is connected to video encoder 5, connect cache interface 6 simultaneously, video encoder 5 comprises again: estimation 5.1, and motion compensation 5.2, they are connected respectively to the DCT discrete cosine transform, anti-fieldization is carried out VLC coding 5.3, and anti-DCT+ inverse quantization partly carries out Rate Control 5.4.
Fig. 2 is described as follows problem:
1, video input interface 2.1 mainly carries out impedance matching and signal clamper to the analog video signal of input, subsequently stable vision signal is sent into the video preprocessor processing module.2.2,, be sent in the video display buffer 2.3 at this moment through phase-locked and digitized processing.In video display buffer, should be able to carry out film-TV format conversion, and can detect the scene change of video image automatically movie program.
2, video encoding module 5 mainly meets the video compression of MPEG-1, MPEG-2, MPEG-4 (deciding on concrete applied environment) standard to treated digital video signal.It mainly comprises modules 5.3 and 5.4 such as estimation, motion compensation, discrete cosine transform (DCT), Variable Length Code, Rate Control.
3, digital signal processor 7 is processors of a high-performance 16bit, and it mainly carries out system's control, audio coding, looks functions such as audio-frequency multiplex.
4, cache interface 6 is connected to the external cache device, and the external cache device is mainly preserved original image signal, reconstructed image signal, and it also can be used as system cache and uses.
Fig. 3 is described as follows problem:
1, the whole system master clock is provided by the 27MHz crystal oscillator, and system's master clock provides work clock for video processing module and buffer after phase-locked loop 1 frequency multiplication; After phase-locked loop (2) frequency multiplication, provide work clock to digital signal processor, to finish system's control.In addition, phase-locked loop (1) should be able to change the frequency multiplication multiple according to the different requirements of system flexibly with phase-locked loop (2).
2, system's another one clock source is the video decode module, and by phase-locked the obtaining of analog video signal (generally still being 27MHz) of input, but this clock may be shaken owing to the instability of input analog video signal.
3, audio clock obtains through the strict locking of video clock, therefore can obtain perfectly to look audio sync.
Expression can be inserted in the main frame easily with the form of the form replacement collector of TV programme acquisition card among Fig. 5.
Claims (3)
1, a kind of multichannel real-time television programme acquisition storage system that is used for the community broad band network, it is characterized in that, 1., acquisition system comprises the all-channel tv tuner of a cable TV CATV signal, it sends into video pre-processor with each video input signals of multiplexer channel output by input interface, the signal of handling one tunnel enters video Cache FIFO, be connected to synchronous clock generator and audio input interface, enter the digital signal processor of main frame again by audio frequency Cache FIFO, another road signal of handling through video pre-processor enters video encoder, and enter digital signal processor, be connected to USB/peripheral hardware control interface USB/PCI controller; 2., storage system comprises for the code stream of multichannel collection and storing simultaneously, require to be configured with the storage speed of several times (2-128).
2, acquisition and memory system according to claim 1, it is characterized in that, video encoder 5 in the acquisition system comprises again: estimation [5.1], motion compensation [5.2], they are connected respectively to the DCT discrete cosine transform, anti-fieldization is carried out VLC coding [5.3], and anti-DCT+ inverse quantization partly carries out Rate Control [5.4].
3, acquisition and memory system according to claim 1 is characterized in that, storage system require configuration comprise PIII 700M's and the high-speed CPU more than the PIII 700M and comprise 7200 revolutions per seconds and the high speed hard-disk more than 7200 revolutions per seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011294426A CN1144425C (en) | 2001-06-20 | 2001-06-20 | Multichannel real-time TV program acquisition and memory system for community wibeband network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011294426A CN1144425C (en) | 2001-06-20 | 2001-06-20 | Multichannel real-time TV program acquisition and memory system for community wibeband network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1323118A CN1323118A (en) | 2001-11-21 |
| CN1144425C true CN1144425C (en) | 2004-03-31 |
Family
ID=4669176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011294426A Expired - Fee Related CN1144425C (en) | 2001-06-20 | 2001-06-20 | Multichannel real-time TV program acquisition and memory system for community wibeband network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1144425C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006186580A (en) * | 2004-12-27 | 2006-07-13 | Toshiba Corp | Playback apparatus and decoding control method |
-
2001
- 2001-06-20 CN CNB011294426A patent/CN1144425C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1323118A (en) | 2001-11-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6678737B1 (en) | Home network appliance and method | |
| USRE47054E1 (en) | System for digital time shifting and method thereof | |
| US20020170059A1 (en) | Universal STB architectures and control methods | |
| US20060275022A1 (en) | Apparatus and method for intelligent multimedia compression and distribution | |
| EP1285533A1 (en) | Universal digital broadcast system and methods | |
| US10230970B2 (en) | Decoded picture buffer size management | |
| US20020026646A1 (en) | Universal STB architectures and control methods | |
| EP2174490A1 (en) | Video processing systems and methods | |
| US9838683B2 (en) | Support for variable number of picture buffers in decoded picture buffer | |
| CN1595975A (en) | Digital television broadcasting system based on MPEG-1 | |
| CN1144425C (en) | Multichannel real-time TV program acquisition and memory system for community wibeband network | |
| US9602817B2 (en) | Management of decoded picture buffer at picture format transitions | |
| US20060294128A1 (en) | Enhanced methods for media processing and distribution | |
| CN1708990A (en) | Transmission of digital audio-visual streams adaptable to existing television equipment - Compression device | |
| CN114915797A (en) | Multi-channel video decoding method and device and related products | |
| CN218416509U (en) | Ultra-high definition encoder supporting transcoding | |
| CN218006426U (en) | AVS2 ultra-high-definition network video and audio professional decoder | |
| EP2873236A1 (en) | Decoded picture buffer size management | |
| CN217721354U (en) | AVS 2K ultra-high-definition professional decoder supporting SMPTE ST2110 standard | |
| CN217693549U (en) | AVS2 ultra-high definition professional decoder supporting transcoding | |
| CN211831022U (en) | IPTV set-top box based on 5G communication | |
| KR20040039113A (en) | PVR Set-top box system capable of indexing, searching and editing the moving picture | |
| CA2406714A1 (en) | Universal digital broadcast system and methods | |
| CN1735170A (en) | Digital orthogonal projection remote education service terminal | |
| CN1592414A (en) | Digital television broadcasting system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040331 Termination date: 20130620 |