CN201655073U - Video-audio coding-decoding test system experiment teaching platform of network digital TV - Google Patents
Video-audio coding-decoding test system experiment teaching platform of network digital TV Download PDFInfo
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- CN201655073U CN201655073U CN 201020060908 CN201020060908U CN201655073U CN 201655073 U CN201655073 U CN 201655073U CN 201020060908 CN201020060908 CN 201020060908 CN 201020060908 U CN201020060908 U CN 201020060908U CN 201655073 U CN201655073 U CN 201655073U
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Abstract
The utility model discloses a video-audio coding-decoding test system experiment teaching platform of network digital TV. A video input interface of the teaching platform is accessed into an inserted video-audio coding-decoding control center through a video AD module. A video DA module is connected with the inserted video-audio coding-decoding control center. The video DA module is provided with a video output interface which can be connected with an LCD video display. An audio input interface is accessed into the audio AD module and the audio DA module. The audio AD module and the audio DA module are bidirectionally connected with the inserted video-audio coding-decoding control center. The audio AD module and the audio DA module are provided with audio output interfaces. The inserted video-audio coding-decoding control center is bidirectionally connected with a USB interface, a debugging serial interface and an audio-video data transmission network interface. The video-audio coding-decoding test system experiment teaching platform of network digital TV can satisfy the test experiment of various signal test for coding and decoding network digital or analog television video and audio, and can also be used for testing, observing and comparing of video-audio signal in maintenance.
Description
Technical field:
The utility model relates to network digital TV, specifically is the video/audio encoding and decoding test macro Platform of Experimental Teaching of network digital TV.
Background technology:
Network digital TV is from television program record, broadcasts the television system of new generation that emission, reception and Network Transmission all adopt numerical coding and digital transmission technology.Digital Television is the focus of current I T industry, and as an information service of soon starting broadcasting in China, it has merged numerous technology such as computing machine, multimedia, communication network.Adopt digital technology that various television equipments are obtained than the higher technical feature of original analog equipment, but also have new function such as the inaccessiable two-way interaction of analogue technique.Network digital TV, digital cable TV distinct image, interactive program pattern, complete information service, brand-new audiovisual impression make TV tech enter the brand-new epoch.At present, digital TV set-top box is based on the simulated television receiving digital television program of cable TV network transmission and the main access platform of numerical information.
In order to adapt to the development of Digital Television, need allow the student in experiment, strengthen network digital TV is looked the concrete understanding of using of encoding and decoding (H.264) of audio frequency, improve the comprehensive Design ability, the international video encoding standard of the composition of understanding vision signal and MPEG, grasp the encoding and decoding principle of work that network digital TV is looked audio frequency, final notion, the core technology of the encoding and decoding of awareness network digital TV video and audio, the general conception of the encoding and decoding system of awareness network digital TV video and audio and bottom technology, the structure of receiving end that the understanding network digital TV is looked the encoding and decoding of audio frequency is to improve and to excite their ability to work and creativity consciousness from now on.
But only offered the simulated television experiment in the university now, and also do not had the network digital TV experiment on the market.The experiment porch that the development network digital TV is looked the encoding and decoding (H.264) of audio frequency has great market outlook.
The utility model content
The purpose of this utility model provides a kind of encoding and decoding signal test system Platform of Experimental Teaching of digital TV video and audio Network Based, carry out the experimental teaching of various signal testings that network digital TV is looked the encoding and decoding of audio frequency to satisfy, also can be suitable for simulation simultaneously and look audio frequency.
Network digital TV of the present utility model is looked in the encoding and decoding signal test system Platform of Experimental Teaching of audio frequency, video input interface inserts embedded video/audio encoding and decoding control center by the video AD module, video DA module is connecting embedded video/audio encoding and decoding control center, be provided with on the video DA module and can connecting the video output interface that the LCD video shows, audio input interface accessing to audio AD, the DA module, audio A, DA module and embedded two-way connection of video/audio encoding and decoding control center, audio A, on the DA module audio output interface is being set, the two-way USB interface that connecting of embedded video/audio encoding and decoding control center, debugging serial interface and audio, video data transport network interface.
Wherein, it is the HI3510 processor of LINUX that the nucleus module of embedded video/audio encoding and decoding control center adopts operating system, simultaneously integration USB interface, debugging serial interface and audio, video data transport network interface.
In the utility model, the video inputs mouth can the input digit TV signal also can be imported anolog TV signals, the audio, video data transport network interface can realize the download of application program and the Network Transmission of audio/video coding data, the debugging serial interface provides the transmission of Debugging message, the control of PC control desk to core system is provided, and USB interface can be used for connecting the USB memory device, can be used for recording of audio frequency and video, also can be used for depositing of audio frequency and video source, also can be used for depositing of alternative document.
When this Platform of Experimental Teaching is used, simulated television video/audio signal or network digital TV video/audio signal are inserted, but the use test instrument and equipment is looked every the technical indicator parameter of audio frequency or Digital Television audio/video signal testing point test video, sound signal in each simulation, and the analog or digital signal of Jie Shouing can show at display screen simultaneously.Test point comprises: output, inserted audio-video control center coding-decoding circuit module and the audio A/D module and the video a/d module of the output of audio signal output, audio frequency D/A module (audio signal decoding D/A circuit module), vision signal output, video d/a (vision signal decoding D/A output circuit module).
Test point can be used oscillograph, standard audio generator, audio analyzer, normal video generator and video analyzer, and the TS code stream can carry out file analysis by the TS analysis software to be handled.And the index parameter of audio frequency and video can carry out test analysis and contrast with reference to the standard that generator and analyser provide.
When this Platform of Experimental Teaching is used, anolog TV signals or digital television signal are inserted, the use test instrument and equipment is in each signal testing point test video of panel, every technical indicator parameter of sound signal, and the analog or digital signal of Jie Shouing can show at display screen simultaneously.The testable video section signal index of hardware parameter has: the video output level, horizontal definition, luminance channel bandwidth (MHz), chrominance channel bandwidth (MHz) brightness nonlinear distortion (%), the brightness waveform distortion, brightness signal to noise ratio (S/N ratio) (dB), colourity signal to noise ratio (S/N ratio) (dB), brightness and carrier chrominance signal delay inequality (ns), the differential gain (%), the differential phase (°), testable audio-frequency unit signal index parameter has: audio output level Vp-p (V), the audio frequency amplitude-frequency response, audio frequency signal to noise ratio (S/N ratio) (dB), audio distortion plus noise (dB), dynamic range (dB), cross-talk (first-harmonic) (dB), 1kHz passage degree of unbalancedness (dB), intermodulation distortion (dB), frequency error (%), level non-linear (dB).
The utility model uses network digital TV experiment porch software, can carry out the Code And Decode of video MPEG and H264, change the parameter of coding, as change sound and look coding, sound and look decoding, sound and look the parameter of A/D and D/A and be provided with by computer software by the audio, video data transport network interface, parameter is provided with result's technical indicator can test and analyze contrast by the way, with the video coding effect under the test different parameters; Can carry out the Code And Decode of audio frequency, change the parameter of audio coding, test different parameters subaudio frequency coding effect, the TS that can obtain DVB flows, and TS stream is analyzed (adopting the TS flow analysis file function of network digital TV experiment porch software to analyze).
The advantage of the utility model simulation and Digital Television test macro Platform of Experimental Teaching is: 1, can make things convenient for the test of the video/audio encoding and decoding signal parameter that carries out simulated television video/audio signal and network digital TV visually, the similarities and differences part of two kinds of TV signal of contrast helps the electrical type Major that the understanding and the design of up-to-date TV tech are offered help; 2, system reliability is strong, can be according to the recent development online upgrading of digital television techniques; Comparison was observed in the test of video-audio signal when 3, this Platform of Experimental Teaching also can be used for keeping in repair; 4, simple in structure, cost is low, easy to use and production.
Description of drawings
Fig. 1 is an apparatus structure synoptic diagram of the present utility model.
Embodiment
See Fig. 1.
Video input interface inserts embedded video/audio encoding and decoding control center by video AD, video DA module is connecting embedded video/audio encoding and decoding control center, on the video DA module video output interface is being set, the LCD video shows the connection video output interface, audio input interface accessing to audio AD, the DA module, audio A, DA module and embedded two-way connection of video/audio encoding and decoding control center, audio A, on the DA module audio output interface is being set, the two-way integration USB interface of embedded video/audio encoding and decoding control center, debugging serial interface and audio, video data transport network interface.
The selection of control device each several part components and parts is specially:
1. embedded video/audio encoding and decoding control center is the core board based on HI3510, has the FLASH of 32M and the SDRAM of 32M, and the model of FLASH is S29GL128N101F, and the model of SDRAM is HY57V281620FIP.
2. video coding chip is TVP5150AM, and video decoding chip is ADV7179, and the audio coding decoding chip is TLV320AIC23.
3. the debugging serial interface circuit adopts the MAX232EWE chip, and serial interface is a DB9 pin type socket.
4. the audio, video data transport network interface is the RJ45 interface.
5.USB interface is USB-A2.
6. the operating system of the nucleus module of embedded video/audio encoding and decoding control center is LINUX.
Claims (2)
1. the video/audio encoding and decoding test macro Platform of Experimental Teaching of a network digital TV, it is characterized in that: video input interface connects into embedded video/audio encoding and decoding control center by the video AD module, video DA module is connecting embedded video/audio encoding and decoding control center, be provided with on the video DA module and can connecting the video output interface that the LCD video shows, audio input interface connects into audio A, the DA module, audio A, DA module and embedded two-way connection of video/audio encoding and decoding control center, audio A, on the DA module audio output interface is being set, the two-way USB interface that connecting of embedded video/audio encoding and decoding control center, debugging serial interface and audio, video data transport network interface.
2. the video/audio encoding and decoding test macro Platform of Experimental Teaching of network digital TV according to claim 1, it is characterized in that: it is the HI3510 processor of LINUX that the nucleus module of embedded video/audio encoding and decoding control center adopts operating system, simultaneously integration USB interface, debugging serial interface and audio, video data transport network interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020060908 CN201655073U (en) | 2010-01-05 | 2010-01-05 | Video-audio coding-decoding test system experiment teaching platform of network digital TV |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020060908 CN201655073U (en) | 2010-01-05 | 2010-01-05 | Video-audio coding-decoding test system experiment teaching platform of network digital TV |
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| Publication Number | Publication Date |
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| CN201655073U true CN201655073U (en) | 2010-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201020060908 Expired - Fee Related CN201655073U (en) | 2010-01-05 | 2010-01-05 | Video-audio coding-decoding test system experiment teaching platform of network digital TV |
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| CN (1) | CN201655073U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104794952A (en) * | 2015-05-14 | 2015-07-22 | 北京交通大学 | Teaching experiment system and teaching experiment method of transponder system |
| CN111711844A (en) * | 2020-06-12 | 2020-09-25 | 深圳市拔超科技有限公司 | IP equipment with bidirectional coding and decoding functions |
-
2010
- 2010-01-05 CN CN 201020060908 patent/CN201655073U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104794952A (en) * | 2015-05-14 | 2015-07-22 | 北京交通大学 | Teaching experiment system and teaching experiment method of transponder system |
| CN111711844A (en) * | 2020-06-12 | 2020-09-25 | 深圳市拔超科技有限公司 | IP equipment with bidirectional coding and decoding functions |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20101124 Termination date: 20110105 |