CN100502503C - Code-transferring system and method for simultaneously realizing multiple code flow output - Google Patents
Code-transferring system and method for simultaneously realizing multiple code flow output Download PDFInfo
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- CN100502503C CN100502503C CNB200610034760XA CN200610034760A CN100502503C CN 100502503 C CN100502503 C CN 100502503C CN B200610034760X A CNB200610034760X A CN B200610034760XA CN 200610034760 A CN200610034760 A CN 200610034760A CN 100502503 C CN100502503 C CN 100502503C
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Abstract
The invention is used to switch a same media stream format at input end into multi different media stream formats at output end. The system comprises: a sharing code-switch module for implementing the switch of shared part used by all output ends; a data buffer module located between the sharing code-switch module and terminal code-switch module; and a control module respectively connected to the sharing code-switch module, terminal code-switch module and buffer module.
Description
Technical field
The present invention relates to the technical field of video code conversion in the digital home, digital video services, specifically, related to and a kind ofly vision signal can have been converted to the digital video signal of a plurality of different qualities, thereby the system and method for appropriate level digital video signal is provided according to user's needs.
Background technology
Traditional Video service generally is meant by camera cable to the direct transmitting television signals of user, thereby provides video frequency programs such as TV, film for the user.Along with Development of Multimedia Technology, equipment such as computer, mobile phone, PDA also begin to have possessed the ability of watching video frequency program, a kind ofly provide digital video information to the user by networks such as broadband, wireless networks, make the user can be whenever and wherever possible, follow one's inclinations on different electric terminals, watch the service of video frequency program quietly to rise digital video services that Here it is with being willing to.
Digital video services is to develop rapidly along with the development of software and hardware technology and digital transmission network, it be a kind of than conventional video service more flexibly, use Video service more widely.The equipment diversity of digital video services, region are random to have proposed new requirement for transmission of video signals and encoding and decoding: how according to the transmission requirement of network, the signal of certain mass is provided to the user? how according to the difference of device processes ability, the signal of different quality is provided to the user? do you how to satisfy multiple user's different demands simultaneously? the method that overcomes the above problems is varied, and transcoding technology is exactly one of them important link.
Transcoding is exactly that current compressed video signal is transformed into other a kind of video compression mode, and the video after the conversion may have different speed, frame per second, frame sign or even compression standard with former video, mode can be different.Transcoding should be able to be handled the conversion that flows to the video flowing of another kind of form from a kind of video of form, transmits by heterogeneous network and some terminal equipments (as common PC, mobile device etc.) with suitable.Transcoding requires and can come video data is carried out transcoding by adjusting series of parameters (comprising video quality, frame per second, resolution or the like), and adjusts encoding characteristics dynamically according to the feature that different communications connects.
The development of Video Transcoding Technology has had history for many years, various technology are also relatively ripe, but, because the limitation of operation environment, what most of technology was in the past considered is that space how to remove to make full use of signal itself, the characteristic of time reduce the complexity of transcoding process, improve transcoding efficiency, consider seldom how multimass video output demand condition carries out transcoding; When needs transmit the video information of the multiple quality of height, normally adopt and be encoded into high-quality code stream earlier, do transcoding again during the output low quality video, can cause waste of time to delay like this with exporting, existence can be treated improvements.
And along with the rise of digital home network, under digital household environment, same video frequency program need convert the output stream of multiple quality usually simultaneously to, and (as pc user, cellphone subscriber) provides different data for different user.In this case, adopt the video code conversion process of traditional single inlet flow, single output stream can cause service need repeat transcoding process, cause the redundancy of delay and the operation of time.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of same media stream formats of input that realizes to the format conversion system between the output of a plurality of different media flows forms.
Another object of the present invention is to according to this format conversion system, a kind of format conversion method that is used for the stream media format of an input is transcoded into simultaneously the various flows media formats of a plurality of outputs is provided.
In order to realize goal of the invention one, the technical scheme of employing is as follows:
A kind of trans-coding system of realizing that many code streams are exported simultaneously, the same media stream formats that is used to realize input comprises to the format conversion between the output of a plurality of different media flows forms:
Realize the public transcoding module of the public part that all outputs of transcoding all use;
The terminal transcoding module of corresponding each output;
Be in the data buffer between public transcoding module and the terminal transcoding module;
And the coordinating control module that is connected with public transcoding module, terminal transcoding module, data buffer respectively.
Public transcoding module of the present invention mainly is responsible for some the public conversion processes in the transcoding process in early stage, and it is all needed to use by each transcoding process usually, the comparatively faster step of speed is formed, provides some basic datas thereby operate for the transcoding of back.Under the different application environment, the realization content of utility module may be very different, such as under the situation of directly accepting the input of simulated television video, what utility module carried out may be the transformation function of color space; Under the situation that adopts the digital video input, what utility module was realized may be the process that original signal is decoded and reduced.
What described data cache module mainly played in whole framework of the present invention is the effect of a buffer, and it also has the characteristic of Route Selection simultaneously.On the left side of data buffering module, be the comparatively faster utility module of speed; On its right, then be speed transcoding nucleus module comparatively slowly.The data buffering module is just in order to coordinate the speed difference problem that the right and left exists; Simultaneously, because the input of data cache module has only a source, the output of promptly public transcoding module, and its output is several data flow, the input of promptly a plurality of terminal transcoding modules is so data cache module also has the function of route control.
Described terminal transcoding module is the main execution unit of whole transcoding work, and mainly relatively elapsed time, each data flow can't be formed by reusable parts by some for it.Transcoding process from single output code flow, the time that the transcoding parts take is whole process the best part, usually need account for 70% or more time, so the thought of streamline has been introduced in the present invention's design in this section, reach the purpose that improves whole efficiency by repeating that a plurality of devices are set.
Described terminal transcoding module comprises that motion vector computation submodule, DCT quantize submodule, huffman coding submodule.
And the streamline of terminal transcoding module is mainly reflected between each module and is undertaken alternately by multiplexed data flow.The data of certain terminal can be used as the multiplex data of another terminal, so pass through the streamline principle of multiplex data, needn't do the same conversion that repeats in each terminal.
Described coordinating control module is mainly used in the co-ordination between each module of control.Because exist the difference on time and the efficient between public transcoding module and the terminal transcoding module, even the centre has increased data cache module, but their work still needs a unified control Consultation Center to finish; Simultaneously, for data cache module, itself has possessed the function of a demultiplexer, but specifically data will be outputed on which transcoding parts, this also needs a control centre to come control and treatment, and this control centre is exactly a coordinating control module.Coordinating control module is the control centre of whole process, and all modules all will be carried out corresponding work under coordinating in its control.
In order further to promote transcoding usefulness of the present invention, public transcoding module comprises color space conversion submodule and partitioned image macro block submodule, and terminal transcoding parts also comprise the color difference calculating sub module.
In order to realize goal of the invention two, the technical scheme of employing is as follows:
A kind of code-transferring method of realizing that many code streams are exported simultaneously, be used for the stream media format of an input is transcoded into simultaneously the various flows media formats of a plurality of outputs, realize input is carried out transcoding to the required common ground of the transcoding between a plurality of outputs by utility module earlier, formation is stored in the interim transcoding stream medium in the data buffer, convert interim transcoding stream medium to stream media format that counterpart terminal is supported by concrete terminal transcoding module again, also undertaken alternately between the described different terminals transcoding module, and described overall process is all controlled by coordinating control module by multiplexed data flow.
In the code-transferring method of the present invention, described coordinating control module comprise control deposit in interim transcoding stream medium in the data buffer be continuous video clips or cut apart after image macro, and correspondingly the control of video segment enters each terminal transcoding module, or controlling different image macro enters different terminal transcoding modules.
Accordingly, described coordinating control module also comprises mutual multiplexed data flow between the control different terminals transcoding module.Described multiplexed data flow has comprised one or both data in motion vector, the color difference.
So, it is to adopt continuous video clips to enter a plurality of terminal transcoding modules simultaneously that coordinating control module may command data enter into concrete terminal transcoding module from data cache module, also can be that image macro enters different terminal transcoding modules, and between different terminals transcoding module, also control the data multiplex between them, and then realize the streamline principle.
The invention has the advantages that:
(1) video code flow that can realize multiple quality forms simultaneously, reduces the redundant operation in the different quality code stream transfer process.The present invention can outwards provide simultaneously the video code flow of multiple quality in the process that same inlet flow is changed, both improved ageingly, has reduced redundant operation again;
(2), realize that lower software and hardware facilities realize the function of high requirement in the thought of video code conversion field introducing streamline.The present invention is by repeating to dispose pith such as motion vector arithmetic unit, and reasonable result data such as recycling motion vector has been realized being doubled and redoubled of computational speed simultaneously; What is more important, the nonidentity operation parts can form a plurality of different qualities, complete video signal flow, they can directly be sent on the user terminal as output signal, from satisfying the multiple demand of different user, have adapted to the application requirements of following digital household environment.
(3) realize having autgmentability and adaptability preferably flexibly.Owing to introduced the thought of streamline, the realization personnel can be according to the factor of each side such as user's needs and actual software and hardware price, be provided with flexibly parts what and still be the software realization by hardware.In practice, the user can dispose the quantity of parts such as motion vector arithmetic unit according to the requirement of oneself, also can select to realize these parts or adopt software systems to realize with hardware.
Description of drawings
Fig. 1 is a trans-coding system structural representation of the present invention;
Fig. 2 is applied to the environment schematic diagram of digital video services for the present invention;
Fig. 3 is applied to the trans-coding system structural representation of digital video services for the present invention.
Embodiment
The present invention is described further below in conjunction with accompanying drawing.
Trans-coding system structural representation of the present invention as shown in Figure 1, comprise utility module, data buffer, coordinating control module, and a plurality of transcoding parts, be respectively transcoding parts 1, transcoding parts 2, ... transcoding parts N, utility module receives outside inlet flow, utility module is connected with data buffer, data buffer is being connected respectively with N transcoding parts, the output code flow of transcoding parts is then corresponding with user's requesting terminal respectively, mutual between each transcoding parts by multiplex data, described coordinating control module then respectively with utility module, metadata cache is connected with the transcoding parts, and by their running of control flows control.
Accompanying drawing 2 is applied to the applied environment schematic diagram of a digital video services for the present invention.Wherein, import the digital video frequency server of sub-district from the video information of satellite into by receiver, digital video frequency server is sent to digital video information on the different user terminals according to requirements of different users after source information is carried out transcoding.Should with terminal three kinds of PDA, PC and HDTV are arranged because their hardware, transmission performance difference, required video quality then is to increase successively.
Trans-coding system of the present invention just is applied to the digital video frequency server at center, the structural representation of the trans-coding system of present embodiment as shown in Figure 3, the input of described utility module is video data stream that video server provided, utility module comprises color-space conversion module, the partitioned image macroblock module, terminal transcoding parts then adopt three, each transcoding parts includes the color difference computing module, the motion vector computation module, the DCT quantization modules, the huffman coding module, the output of transcoding parts 1 is connected on the user PDA, the output of transcoding parts 2 is connected on the pc user, the output of transcoding parts 3 is connected on the HTDV user, between transcoding parts 1 and the transcoding parts 2, color difference multiplex data between transcoding parts 2 and the transcoding parts 3 is mutual by difference calculating module, and the multiplex data of motion vector is then mutual by the vector computing module.
The implementation process of present embodiment is as follows:
1, receiver imports digital video frequency server into from satellite received signal;
2, after trans-coding system receives signal, at first signal is carried out following two operations by utility module:
The conversion of color space is also carried out in sampling, and the signal of rgb space is converted into the YCbCr signal;
Image after transforming is carried out macroblock partitions, and the result is put into the data buffer zone;
3, buffering area imports the different images frame into different transcoding parts respectively under the control of tuning controller.And allow transcoding parts 1,2,3 respectively image 1-5,1-3,1-2 be carried out the calculating of motion vector and the calculating of color difference;
4, addressable part 1 calculates a digital video frequency flow based on image 1,5 as output, imports the motion vector and the color difference that obtain in the computational process into addressable part 2 simultaneously; Addressable part 2 calculates a motion vector and a color difference based on image 1,3, and then the multiplex data that result of calculation and addressable part 1 transmit differed from subtracts computing, finally forms the digital video frequency flow output based on image 1,3,5; Equally, for transcoding parts 3, it at first calculates a motion vector and a color difference based on image 1,2, and the multiplex data that result and addressable part 2 are transmitted calculates again, finally forms a video output streams based on image 1,2,3,5;
5, for the video data of 3 different qualities that form, server sends to them on the different terminal uses by different load modes again.
Claims (2)
1, a kind of trans-coding system of realizing that many code streams are exported simultaneously, the same media stream formats that is used to realize input is characterized in that comprising to the format conversion between the output of a plurality of different media flows forms:
Realize the public transcoding module of the public part that all outputs of transcoding all use, public transcoding module comprises color space conversion submodule and partitioned image macro block submodule;
The terminal transcoding module of corresponding each output, terminal transcoding module comprises that motion vector computation submodule, DCT quantize submodule, huffman coding submodule, color difference calculating sub module, undertaken alternately by multiplexed data flow between the described terminal transcoding module, described multiplexed data flow has comprised one or both data in motion vector, the color difference;
Be in the data cache module between public transcoding module and the terminal transcoding module;
And the coordinating control module that is connected with public transcoding module, terminal transcoding module, data cache module respectively.
2, a kind of code-transferring method of realizing that many code streams are exported simultaneously, be used for the stream media format of an input is transcoded into simultaneously the various flows media formats of a plurality of outputs, it is characterized in that realizing input is carried out transcoding to the required common ground of the transcoding between a plurality of outputs by public transcoding module earlier, formation is stored in the interim transcoding stream medium in the data cache module, convert interim transcoding stream medium to stream media format that counterpart terminal is supported by concrete terminal transcoding module again, also undertaken alternately by multiplexed data flow between the described different terminals transcoding module, described multiplexed data flow has comprised motion vector, one or both data in the color difference;
Overall process is all controlled by coordinating control module, coordinating control module comprise control deposit in interim transcoding stream medium in the data cache module be continuous video clips or cut apart after image macro, and correspondingly the control of video segment enters each terminal transcoding module, or controlling different image macro enters different terminal transcoding modules.
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| CNB200610034760XA CN100502503C (en) | 2006-03-31 | 2006-03-31 | Code-transferring system and method for simultaneously realizing multiple code flow output |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101552945A (en) * | 2009-05-08 | 2009-10-07 | 中兴通讯股份有限公司 | A method and system for implementing media content sharing |
| CN101964894B (en) * | 2010-08-24 | 2012-11-14 | 中国科学院深圳先进技术研究院 | Method and system for parallel trans-coding of video slicing |
| CN102006311A (en) * | 2010-12-28 | 2011-04-06 | 青岛海信网络科技股份有限公司 | Streaming media multifunctional distributing system and method |
| CN104717507A (en) * | 2015-03-31 | 2015-06-17 | 北京奇艺世纪科技有限公司 | Video transcoding method and device |
| CN105611211B (en) * | 2015-12-22 | 2019-04-16 | 广东威创视讯科技股份有限公司 | Video format switch and display device |
| CN111988608A (en) * | 2020-07-08 | 2020-11-24 | 北京兰亭数字科技有限公司 | 8K down-sampling encoder and use method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1366779A (en) * | 2000-04-18 | 2002-08-28 | 皇家菲利浦电子有限公司 | Bit rate allocation in joint bit rate transcoding |
| US6493386B1 (en) * | 2000-02-02 | 2002-12-10 | Mitsubishi Electric Research Laboratories, Inc. | Object based bitstream transcoder |
| CN1461567A (en) * | 2000-09-20 | 2003-12-10 | 通用仪器公司 | Processor allocation for channels in video multi-processor system |
| CN1538696A (en) * | 2003-10-24 | 2004-10-20 | 清华大学 | Multipath real time video-frequency gateway for supporting large capacity user and its application method |
| CN1573808A (en) * | 2003-05-19 | 2005-02-02 | 富士胶片株式会社 | Apparatus and method for moving image conversion, apparatus and method for moving image transmission, and programs therefor |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6493386B1 (en) * | 2000-02-02 | 2002-12-10 | Mitsubishi Electric Research Laboratories, Inc. | Object based bitstream transcoder |
| CN1366779A (en) * | 2000-04-18 | 2002-08-28 | 皇家菲利浦电子有限公司 | Bit rate allocation in joint bit rate transcoding |
| CN1461567A (en) * | 2000-09-20 | 2003-12-10 | 通用仪器公司 | Processor allocation for channels in video multi-processor system |
| CN1573808A (en) * | 2003-05-19 | 2005-02-02 | 富士胶片株式会社 | Apparatus and method for moving image conversion, apparatus and method for moving image transmission, and programs therefor |
| CN1538696A (en) * | 2003-10-24 | 2004-10-20 | 清华大学 | Multipath real time video-frequency gateway for supporting large capacity user and its application method |
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