CN2605711Y - Video signal terminal device - Google Patents
Video signal terminal device Download PDFInfo
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- CN2605711Y CN2605711Y CN 03228585 CN03228585U CN2605711Y CN 2605711 Y CN2605711 Y CN 2605711Y CN 03228585 CN03228585 CN 03228585 CN 03228585 U CN03228585 U CN 03228585U CN 2605711 Y CN2605711 Y CN 2605711Y
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Abstract
The utility model provides a video terminal apparatus used in the desktop video conferencing for the image and audio compression coding, which includes an audio collection and analog-to-digital conversion module, a video collection and analog-to-digital conversion module, a video camera and CPU module, a video and audio compressed hybrid encoding module and a USB interface module, the output ends of the audio collection and analog-to-digital conversion module and the video collection and analog-to-digital conversion module are respectively connected with the input ends of the video and audio compressed hybrid encoding module, the video and audio compressed hybrid encoding module is connected with the CPU module by a bus, the output end of the CPU module is connected with the input end of the USB interface module. The video and audio compressed hybrid encoding module can be connected with the CPU module by an FIFO buffer. The utility model is mainly applied in electric utility, public security, banks, transportation and enterprises and government units with the video conferencing system requirements.
Description
Technical field
The utility model relates to the terminal installation in a kind of video conferencing system, particularly a kind ofly is used for the video signal terminal device that desktop conference can carry out image and audio compression coding.
Background technology
In current video conferencing system, the supporting body of meeting is the large-scale video compression decompressing device of a cover often, and the place of meeting is special-purpose meeting room, such system uses quite inconvenience, cost height, instructions for use are also high, are very restricted on practicality.Such video conferencing system can not enter general office and family, but it is more and more convenient that people always thirst for communication, can be on the desk of oneself holding video conference, remove from outside the inconvenience that focuses on special-purpose meeting room, also saved special-purpose meeting room and special equipment.Certainly, this special-purpose meeting room adopts specialized apparatus, video signal terminal device also is to match with the video conference device of special use, along with office automation deeply and popularize, computer is popularized in office, people wish and can come holding video conference by computer, so a kind ofly are suitable for the necessary condition that video signal terminal device that computer uses just becomes desktop conference, and the utmost point is waited to develop.
The utility model content
The utility model provides a kind of video signal terminal device that is used for desktop conference that can carry out image and audio compression coding at the problem of above existence.
In order to realize above purpose, the utility model is achieved through the following technical solutions: a kind of video signal terminal device is provided, comprise audio collection and mould/number conversion module, video acquisition and mould/number conversion module, video camera and CPU module, look audio compression composite coding module and usb interface module, the output of audio collection and mould/number conversion module and video acquisition and mould/number conversion module links to each other with the input of looking audio compression composite coding module respectively, look audio compression composite coding module and link to each other by bus with the CPU module, the output of CPU module links to each other with the input of usb interface module.
Looking audio compression composite coding module can link to each other with the CPU module by fifo buffer, the input that is fifo buffer links to each other with the output of looking audio compression composite coding module, and the output of fifo buffer links to each other with the input of CPU module.
Adopt the video terminal device of above structure can carry out IMAQ, compressed encoding and communication,, make that carrying out video conference on desk becomes possibility for the desktop type conference terminal provides solution.Mainly be applicable to electric power, public security, bank, traffic and the enterprises and institutions that the video conferencing system demand is arranged.
Further specify embodiment of the present utility model below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is a kind of example structure schematic block diagram of the video signal terminal device that proposes of the utility model;
Fig. 2 is a kind of embodiment circuit theory schematic diagram of the video signal terminal device that proposes of the utility model;
Fig. 3 is the program circuit schematic diagram of CPU in the video signal terminal device that proposes of the utility model.
Embodiment
Fig. 1 provides is a kind of example structure schematic block diagram of the video signal terminal device that proposes of the utility model.It comprises an audio collection and mould/number conversion module 1, video camera 2, video acquisition and mould/number conversion module 3, look audio compression composite coding module 4, fifo buffer (FIFO) 5, CPU module 6 and usb interface module 7.The output of audio collection and mould/number conversion module 1 and video acquisition and mould/number conversion module 3 links to each other with the input of looking audio compression composite coding module 4 respectively, looking audio compression composite coding module 4 can be directly link to each other by bus with CPU module 6, looking audio compression composite coding module 4 also can link to each other with CPU module 6 by fifo buffer 5, the input that is fifo buffer 5 links to each other with the output of looking audio compression composite coding module 4, and the output of fifo buffer 5 links to each other with the input of CPU module 6.The output of CPU module 6 links to each other with the input of usb interface module 7.
The simulated audio signal from the input of MICROPHONE or LINE IN equipment that audio collection and mould/number conversion module 1 will collect converts digital audio and video signals to and is transported to and looks audio compression composite coding module 4; The analog video signal that video acquisition and mould/number conversion module 3 sends video camera 2 converts digital video signal to and outputs to and look audio compression composite coding module 4; Look audio compression composite coding module 4 digital audio and video signals and the digital video signal of receiving compressed, encodes and will encode after video flowing and audio stream carry out composite coding, the output of formation data flow is passed through fifo buffer 5 to CPU modules or is directly delivered to the CPU module; The CPU module then is sent to the data that receive in the usb interface module and goes, and by usb interface module data is sent to computer by the USB mouth.
Fig. 2 is a kind of embodiment circuit theory schematic diagram of the video signal terminal device that proposes of the utility model;
Audio collection and mould/number conversion module 1 contains an audio collection and mould/number conversion chip U1, the model of U1 can be PCM1800, U1 converts the simulated audio signal that collects to digital audio and video signals and outputs to by the I2S bus and look audio compression composite coding module 4, audio collection and mould/number conversion module 1 by the I2S bus with look audio compression composite coding module 4 and link to each other.
Video acquisition and mould/number conversion module 3 contains a video acquisition and mould/number conversion chip U3, the model of U3 can be SAA7113, the digital video signal that U3 converts analog video signal to ITU601 or ITU656 form outputs to looks audio compression composite coding module 4, the holding wire of video acquisition and mould/number conversion module 3 with look audio compression composite coding module 4 and link to each other.
Look audio compression composite coding module 4, contain one and look audio compression composite coding chip U4, the model of U4 can be MB86391, U4 with original digital video signal with MPEG1/2/4, H.261/3/3+/form of 3++/4 compresses, original digital audio and video signals is compressed with MPEG1-Layer1/2/3, MPEG2-Layer1/2, G.721/3/9 form, again video flowing behind the compressed encoding and audio stream are carried out composite coding, the data flow that forms PS or TS form outputs to fifo buffer 5; Looking audio compression composite coding module 4 links to each other with fifo buffer (FIFO) 5 with audio/video flow exclusive data bus by reading signal lines.
Fifo buffer (FIFO) 5 contains a buffer chip U5, and the model of U5 can be IDT7206, and fifo buffer is used for cushioning the data flow of looking the output of audio compression composite coding module.
Looking audio compression composite coding module 4 links to each other with CPU module 6 by data/address bus, fifo buffer (FIFO) 5 can link to each other with CPU module 6 by data/address bus, also can link to each other with CPU module 6 by reading signal lines, CPU module 6 links to each other with USB module 7 by address bus.
Fig. 3 is the program circuit schematic diagram of CPU in the video signal terminal device that proposes of the utility model.
When software begins to carry out, at first the global variable that uses in the program is carried out initialization, obtain the original position of USB hardware description table then, and read the content of hardware description table; USB hardware is enumerated again, made the USB main equipment discern this equipment again; The MPEG2 coding module is carried out initialization, make it enter operating state, in this process, open the interruption of equipment, and the initialization interrupt service routine; Read the state of FIFO, inquire about it and whether be in half-full state, if half-full state half-full then label FIFO, otherwise the state of continuation inquiry FIFO.When interrupting producing, equipment enters the Interrupt Process process, carries out interrupt service routine, and in this process, program judges whether it is that frame interrupts earlier, if then send the data of some by the USB oral instructions; Interrupt then judging whether to be that endpoint transmission is interrupted if not frame, if then read the data that the USB oral instructions come, and it is resolved, and finish corresponding action according to corresponding order; Interrupt then judging whether to be that serial ports interrupts if not endpoint transmission,, and send, return then and be interrupted the instruction execution, interrupt then directly returning being interrupted instruction if not serial ports by the USB mouth if then read the data that serial ports is sent.
Workflow of the present utility model is: convert thereof into analog video signal behind the video camera 2 picked-up reality scenes, give video acquisition and mould/number conversion module 2, video acquisition and mould/number conversion module 3 converts analog video signal to digital video signal and outputs to and look audio compression composite coding module 4; Simultaneously, audio collection and mould/number conversion module 1 converts simulated audio signal to digital audio and video signals and outputs to by the I2S bus and look audio compression composite coding module 4; Look audio compression composite coding module 1 original vision signal is compressed, original audio signal is compressed, then video flowing behind the compressed encoding and audio stream are carried out composite coding, the data flow of formation outputs to fifo buffer 5; 6 of CPU modules in usb interface module 7, send to computer with data by USB interface by usb interface module 7 with data-moving.
It more than is specific embodiment of the utility model, the utility model is not limited to above embodiment, many distortion can also be arranged, in force, each module all can be substituted use by other chips of identical function, also can be not limited to MPEG1/2/4 and H.261/3/3+/3++/4 for image compression format.Those of ordinary skill in the art can all should think protection range of the present utility model from all distortion that the disclosed content of the utility model directly derives or association obtains.
Claims (10)
1, a kind of video signal terminal device, comprise audio collection and mould/number conversion module (1), video acquisition and mould/number conversion module (3), video camera (2) and CPU module (6), it is characterized in that, be provided with and look audio compression composite coding module (4) and usb interface module (7), audio collection and mould/number conversion module (1) links to each other with the input of looking audio compression composite coding module (4) respectively with the output of video acquisition and mould/number conversion module (3), look audio compression composite coding module (4) and link to each other by bus with CPU module (6), the output of CPU module (6) links to each other with the input of usb interface module (7).
2, video signal terminal device according to claim 1, it is characterized in that, the described audio compression composite coding module (4) of looking links to each other with CPU module (6) by fifo buffer (5), fifo buffer (5) one ends with look audio compression composite coding module (4) and link to each other, the other end of fifo buffer (5) links to each other with CPU module (6).
3, video signal terminal device according to claim 2 is characterized in that, described fifo buffer (5) comprises buffer chip U5, and buffer chip U5 is IDT7206,
4, video signal terminal device according to claim 1 and 2 is characterized in that, described CPU module (6) comprises chip U6, and U6 is AT8052, and usb interface module (7) comprises chip U7, and U7 is AN2131.
According to claim 1 or 2 or 3 described video signal terminal devices, it is characterized in that 5, the described audio compression composite coding module (4) of looking comprises and looks audio compression composite coding chip U4.
6, video signal terminal device according to claim 5 is characterized in that, looking audio compression composite coding U4 is MB86391.
7, according to claim 1 or 2 or 3 described video signal terminal devices, it is characterized in that, described audio collection and mould/number conversion module (1) comprises audio collection and mould/number conversion chip U1, and described video acquisition and mould/number conversion module (3) comprises video acquisition and mould/number conversion chip U3.
8, video signal terminal device according to claim 7 is characterized in that, described audio collection and mould/number conversion chip U1 is PCM1800, and video acquisition and mould/number conversion chip U3 is SAA7113.
According to claim 1 or 2 or 3 described video signal terminal devices, it is characterized in that 9, usb interface module (7) leaves interface.
According to claim 1 or 2 or 3 described video signal terminal devices, it is characterized in that 10, described CPU module (6) and usb interface module (7) separate or lump together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03228585 CN2605711Y (en) | 2003-01-22 | 2003-01-22 | Video signal terminal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03228585 CN2605711Y (en) | 2003-01-22 | 2003-01-22 | Video signal terminal device |
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| Publication Number | Publication Date |
|---|---|
| CN2605711Y true CN2605711Y (en) | 2004-03-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 03228585 Expired - Fee Related CN2605711Y (en) | 2003-01-22 | 2003-01-22 | Video signal terminal device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100420283C (en) * | 2006-07-13 | 2008-09-17 | 北京中星微电子有限公司 | Image sensor and computer system utilizing the same image sensor |
| CN101340545B (en) * | 2007-07-04 | 2010-07-07 | 广达电脑股份有限公司 | High-resolution video conference system and method |
| CN102243615A (en) * | 2011-03-21 | 2011-11-16 | 广东志成冠军集团有限公司 | Memory buffer management mechanism supporting audio/video frame storage |
| CN1997057B (en) * | 2005-11-26 | 2012-01-18 | 沃福森微电子股份有限公司 | Audio device |
-
2003
- 2003-01-22 CN CN 03228585 patent/CN2605711Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1997057B (en) * | 2005-11-26 | 2012-01-18 | 沃福森微电子股份有限公司 | Audio device |
| CN100420283C (en) * | 2006-07-13 | 2008-09-17 | 北京中星微电子有限公司 | Image sensor and computer system utilizing the same image sensor |
| CN101340545B (en) * | 2007-07-04 | 2010-07-07 | 广达电脑股份有限公司 | High-resolution video conference system and method |
| CN102243615A (en) * | 2011-03-21 | 2011-11-16 | 广东志成冠军集团有限公司 | Memory buffer management mechanism supporting audio/video frame storage |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HANGZHOU ELECTRIC POWER TECHNOLOGY CO. Free format text: FORMER OWNER: ZHANG JIAN Effective date: 20040813 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20040813 Address after: 310013, Hangzhou, Zhejiang Province, Xihu District Miao Road No. 18 Huaxing Industrial Village, 2, 4 Patentee after: Hangzhou Guangsai Electric Power Science And Technology Co., Ltd Address before: Hangzhou City, Zhejiang province 310013 No. 508 Wensanlu Road Tianyuan Building 12 Patentee before: Zhang Jian |
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| PP01 | Preservation of patent right |
Effective date of registration: 20080417 Pledge (preservation): Preservation |
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| PD01 | Discharge of preservation of patent |
Date of cancellation: 20081017 Pledge (preservation): Preservation registration |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040303 |