CN201181980Y - High-definition video collection card based on PCI bus interface - Google Patents
High-definition video collection card based on PCI bus interface Download PDFInfo
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- CN201181980Y CN201181980Y CNU2008200567375U CN200820056737U CN201181980Y CN 201181980 Y CN201181980 Y CN 201181980Y CN U2008200567375 U CNU2008200567375 U CN U2008200567375U CN 200820056737 U CN200820056737 U CN 200820056737U CN 201181980 Y CN201181980 Y CN 201181980Y
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Abstract
The utility model relates to a high-definition video acquisition card based on a PCI bus interface, which comprises a front-end high-speed video AD unit, a front-end audio AD unit, a DSP acquisition circuit and a memory; wherein, the front-end high-speed video AD unit is used for providing acquisition of video signals with a plurality of formats; the front-end audio AD unit is used for providing acquisition of audio signals; the DSP acquisition circuit is respectively connected with the front-end high-speed video AD unit and the front-end audio AD unit to process the input video and audio signals, and then transmits the processed signals to the host computer through the PCI bus; and the memory is connected with the DSP acquisition circuit and caches the video data transmitted from the front-end video AD unit and the audio data transmitted from the front-end audio AD unit. The utility model has the following beneficial effects: the utility model is compatible with the current significant high-definition video signals; the utility model realizes the automatic identification of signals sources and the automatic identification of signal source types (resolution), and a single card can realize the high-definition video and audio signal acquisition which is always seen currently. The utility model can be widely used in the places with requirements for high-definition video and audio signal acquisition, such as the video conferencing, distance education, telemedicine, video monitoring and the like.
Description
Technical field
The utility model relates to a kind of high definition video collecting card based on pci bus interface.
Background technology
The mode that the transmission of high-definition video signal is at present adopted mainly contains HDMI, aberration (YPrPb), modes such as VGA, DVI-I/DVI-D, and existing high definition video collecting card can't be accomplished whole compatibilities, and do not possess the automatic recognition capability of video input signals, and resolution that can't Dynamic Recognition incoming video signal source.
The utility model content
The purpose of this utility model has provided a kind of high definition video collecting card based on pci bus interface, solve existing high definition video collecting card and can't accomplish whole compatibilities, and do not possess the automatic recognition capability of video input signals, and the technical problem of resolution that can't Dynamic Recognition incoming video signal source.
For achieving the above object, the utility model has adopted following technical scheme:
The utility model discloses a kind of high definition video collecting card, it is characterized in that: comprise based on pci bus interface
Front end video AD unit is to provide the collection of video signal of multiple form;
Front end audio A unit is to provide the collection of audio signal;
The DSP Acquisition Circuit is connected with front end video AD unit and front end audio A unit respectively, and with to the handling of video, the audio digital signals of input, and the signal after will handling exports main frame to by pci bus;
Memory is connected with the DSP Acquisition Circuit, and the voice data that transmits with video data that front end video AD unit is transmitted and front end audio A unit carries out buffer memory.
As preferred version, front end video AD unit adopts the AD9880 chip of ADI, and front end audio A unit adopts the PCM1801U chip of TI, and the DSP Acquisition Circuit adopts the TMS320DM642 chip of TI, and memory adopts two 16MB memory chips.
The beneficial effects of the utility model are: can compatible main high-definition video signals at present, and realized the automatic identification of signal source and the automatic identification of signal source type (resolution), can realize the collection of present common high resolution video and audio signal by the monolithic card.Needing can be widely used in the place of high resolution video signal collective, as video conference, long-distance education, tele-medicine, video monitoring etc.
Description of drawings
Fig. 1 is a structured flowchart of the present utility model;
Fig. 2 is the circuit diagram of video interface part.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
A kind of as shown in Figure 1 high definition video collecting card based on pci bus interface, this high definition video collecting card adopts the AD9880 of ADI company as front end video AD unit, this chip can be realized the video signal collective of aberration, VGA, DVI-I/DVI-D, HDMI, can support the input of 1080p Full HD vision signal.Front end audio A unit has adopted the PCM1801 chip of TI company, and this chip can provide the collection of two-way simulated audio signal, the audio collection of the highest support 44.1KHz CD Quality.The DSP Acquisition Circuit has adopted the TMS320DM642 chip of TI company, and this chip provides the digital input capability of multichannel video/audio signal.Memory is the 16MB memory chip of two MICRON companies, has constituted the storage and the program space of 32MB.
The high definition capture card is under the control of DSP application program, and initialization video AD front-end chip starts and gathers.The voice data that video data that video front AD is sent here and audio front end AD send here carries out buffer memory, through after the format conversion of video data by the pci bus interface of DSP, be transferred to the master control system of main frame in the mode of DMA.This master control system can be a PC generally speaking, also can be other embedded system that has pci bus interface, comprises the embedded system that adopts PowerPC and arm processor.
When the video front signal is VGA, DVI-I, DVI-D, the DSP primary control program can be monitored the clock of digital video signal at any time, in designated time intervals (ordinary circumstance is the hundreds of millisecond), can restart AD9880 video input signals is followed the tracks of, so that the change of identification incoming video signal resolution.
Generally speaking, what the DSP acquisition process circuit of this high definition capture card adopted is the TMS320DM642 chip, but also can change to other dsp chip or fpga chip easily, but inevitably can bring the rising on the cost.
This high definition capture card makes full use of many input capabilities of AD9880, and carry out Dynamic Recognition signal source, signal source type by the DSP program, the video of input, audio frequency input can be finished some conversion earlier in the DSP side, comprise convergent-divergent, processing such as the noise reduction of audio signal, after finishing dealing with, adopt the mode of DMA to send result data to main frame.
Fig. 2 is the circuit diagram of video interface part, wherein:
J1:VGA15 needle interface female seat;
J2:DVI-I interface female seat;
The U10:AD9880 chip;
FB1, FB2, FB3, FB4, FB5, FB6, FB7, FB8, FB9, FB10: be the high frequency magnetic bead;
R1, R2, R3, R4, R5, R6: be vision signal terminal build-out resistor;
C1, C2, C3, C4, C5, C6, C7, Cg: be the signal capacitance;
R7, R8: be I2C bus pull-up resistor.
Its operation principle:
VGA input signal, color difference input signal insert the video inputs mouth 0 of AD9880; DVI-I/DVI-D inserts the video inputs mouth 1 of AD9880;
1, aberration input
Color difference signal inserts through VGA joint (J1), when AD9880 is operated in analog interface 0 input pattern,, provide indication by register detecting no level synchronously and during vertical synchronizing signal, master cpu can detect the type of input signal through the I2C bus, and switches to the aberration input mode;
2, VGA input
The VGA input signal inserts through VGA joint (J1), when AD9880 is operated in analog interface 0 input pattern, when having detected horizontal synchronization and vertical synchronizing signal, provide indication by register, master cpu can detect the type of input signal through the I2C bus, and switches to the VGA input mode;
3, DVI-D input
The DVI-D input signal inserts through DVI joint (J2), and when AD9880 was operated in digital input pattern, AD9880 can accept digital DVI input signal source, and provides indication by relevant register.Master cpu can detect the type of input signal through the I2C bus, and switches to DVI numeral input mode.
4, DVI-I input
The DVI-I input signal inserts through DVI joint (J2), and when AD9880 was operated in digital input pattern, AD9880 can accept digital DVI input signal source, and provides indication by relevant register.During AD9880 work simulation interface 1 input pattern, AD9880 can accept this analog input signal, and provides indication by relevant register.Master cpu can detect the type of input signal through the I2C bus, and switches to the analog input channel of DVI interface.
5, HDMI input
This high definition video collecting card can change the DVI signal adapter by external HDMI, accepts the input of HDMI signal, but the support of HDCP agreement is not provided.Be equal to the DVI-I input mode during input of HDMI signal.
Originally be stuck in power on after, at first by master cpu initialization AD9880 chip, AD9880 detects the external input signal source automatically, this is provided with the relevant register value.The logical I2C bus of master cpu reads the value of these registers, so that information such as the kind of judgement input signal and resolution, and under the corresponding pattern of control AD9880 work.
AD9880 is transferred to subsequent process circuit with the video data that collects by VP2D bus among Fig. 2 and VC_CLK signal.
Claims (5)
1, based on the high definition video collecting card of pci bus interface, it is characterized in that: comprise
Front end video AD unit is to provide the collection of video signal of multiple form;
Front end audio A unit is to provide the collection of audio signal;
The DSP Acquisition Circuit is connected with front end video AD unit and front end audio A unit respectively, and with to the handling of video, the audio digital signals of input, and the signal after will handling exports main frame to by pci bus;
Memory is connected with the DSP Acquisition Circuit, and the voice data that transmits with video data that front end video AD unit is transmitted and front end audio A unit carries out buffer memory.
2, by the described high definition video collecting card based on pci bus interface of claim 1, it is characterized in that: described front end video AD unit adopts the AD9880 chip of ADI.
3, by the described high definition video collecting card based on pci bus interface of claim 1, it is characterized in that: described front end audio A unit adopts the PCM1801U chip of TI.
4, by the described high definition video collecting card based on pci bus interface of claim 1, it is characterized in that: described DSP Acquisition Circuit adopts the TMS320DM642 chip of TI.
5, by the described high definition video collecting card based on pci bus interface of claim 1, it is characterized in that: described memory adopts two 16MB memory chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200567375U CN201181980Y (en) | 2008-03-28 | 2008-03-28 | High-definition video collection card based on PCI bus interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200567375U CN201181980Y (en) | 2008-03-28 | 2008-03-28 | High-definition video collection card based on PCI bus interface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201181980Y true CN201181980Y (en) | 2009-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008200567375U Expired - Lifetime CN201181980Y (en) | 2008-03-28 | 2008-03-28 | High-definition video collection card based on PCI bus interface |
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| Country | Link |
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| CN (1) | CN201181980Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103024359A (en) * | 2012-12-25 | 2013-04-03 | 四川赛狄信息技术有限公司 | Embedded image recorder |
| CN104219505A (en) * | 2014-09-29 | 2014-12-17 | 济南中维世纪科技有限公司 | Multichannel high-definition analog audio and video acquisition system based on PCIe (peripheral component interface express) |
-
2008
- 2008-03-28 CN CNU2008200567375U patent/CN201181980Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103024359A (en) * | 2012-12-25 | 2013-04-03 | 四川赛狄信息技术有限公司 | Embedded image recorder |
| CN104219505A (en) * | 2014-09-29 | 2014-12-17 | 济南中维世纪科技有限公司 | Multichannel high-definition analog audio and video acquisition system based on PCIe (peripheral component interface express) |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: AVCON INFORMATION TECHNOLOGY CO., LTD. Free format text: FORMER NAME: SHANGHAI AVCON INFORMATION TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 200433 Shanghai City, Yangpu District National Road No. 335 Patentee after: Information Technology Co., Ltd. Shanghai Avcon Address before: 200433 Shanghai City, Yangpu District National Road No. 335 Patentee before: Shanghai Avcon Information Technology Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20090114 |
|
| CX01 | Expiry of patent term |