CN200947652Y - Digital video recorder coding and decoding board - Google Patents
Digital video recorder coding and decoding board Download PDFInfo
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- CN200947652Y CN200947652Y CN 200620017694 CN200620017694U CN200947652Y CN 200947652 Y CN200947652 Y CN 200947652Y CN 200620017694 CN200620017694 CN 200620017694 CN 200620017694 U CN200620017694 U CN 200620017694U CN 200947652 Y CN200947652 Y CN 200947652Y
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Abstract
The utility model provides a DVDRW coding and decoding plate whose analog circuit and digital circuit are all arranged on a double-surface plate. A small SCART plate hung on outside of the double-surface plate implements the CANAL plus function. As the analog circuit and the digital circuit of the utility model DVDRW coding and decoding plate are all arranged on the double-surface plate, the integrated design of the DVDRW coding and decoding plate makes the manufacture process is simplified and the cost is low.
Description
Technical field
The utility model relates to electronic applications, relates in particular to the digital video recorder circuit board technology.
Background technology
Along with the raising day by day of science and technology development and people's income level, digital video recorder (DVDRW, Digital Video Recoder) replaces analog tape formula video tape recorder (VHS) or even DVD gradually, becomes product with strongest influence power in the household electrical appliances.。
Digital video recorder is that a kind of simulation sound that will import, vision signal are carried out digital coding, in real time sound, video data is stored on the CD, and has the machine of common DVD playing function.DVDRW is the product of first huge capacity compact discs storage in the household appliances, has become the central platform of Internet appliance product, becomes the center of family information resource simultaneously.
At present, the DVDRW system mainly contain with M-JPEG, H.261, the compress mode of MPEG-1, MPEG-2.The MJPEG compress mode expends a large amount of CDs and bandwidth, is not suitable for home video, and hardware supports is not extensive, and the repair and upgrade of equipment all is difficult to guarantee.H.261 compress mode difficulty on picture quality is accomplished very high definition, does not more have advantage in video recording, can't accomplish big compression ratio and variable Rate video recording etc.The MPEG-1 compress mode has very big compression flexibility, but can only reach 200 multi-thread horizontal resolutions.The MPEG-2 compression algorithm, except that the compression flexibility that possesses MPEG-1, its kinescope image quality can reach the 500 line horizontal resolutions of DVD.
The analog-and digital-circuit of DVDRW constitutes complicated, the signal trend is comparatively loaded down with trivial details, for the integrated circuit board exploitation of DVDRW has been brought very big difficulty, therefore most of producers all adopt analog circuit and digital circuit to be divided into the design that two double sided boards or analog board employing double sided board and digiboard adopt four laminates.
But consider that from the manufacturing process direction there is following shortcoming in the design that adopts analog circuit (double sided board) and digital circuit (four laminates) to separate:
1) four laminate manufacturing process complexity of digital circuit, the production cycle is long, has prolonged the delivery cycle of product.
Not high when 2) integrated circuit board mounts to SMD chip mounter utilance, not high during plug-in unit to plug-in unit production line utilance yet.
3) connecting line is more when final assembly, causes complete machine production efficiency to descend.
Consider that from manufacturing cost there is following shortcoming in the design that adopts analog circuit (double sided board) and digital circuit (four laminates) to separate:
1) adopt the design of two boards card to cause the production cycle long, the not high cost of entire product that allows of production line utilance improves greatly, and is very inconvenient to the realization of the economic benefit of product.
2) connecting line and splicing ear are more, have improved the cost of product.
3) design of two boards increases the area of pcb board, adds that digital circuit adopts the design of four laminates, has increased the cost of integrated circuit board and complete machine.
Consider that from optimizing performance and expanded function the design connecting line of two boards is more again, the performance index of product have been produced certain influence, reduced the technical indicator of product.Therefore, the design of two boards card increases the failure rate of production greatly, especially aspect complete machine production, the control of production efficiency and production cost is brought very big inconvenience.
In sum, adopt the circuit board of the design that analog circuit (double sided board) and digital circuit (four laminates) separate to cause complex manufacturing, the cost height, expanded function is shortcoming such as less, and the marketing of product and the growth of economic benefit have been brought very big inconvenience.
The utility model content
In view of this, the purpose of the utility model is to provide a kind of DVDRW encoding and decoding plate, so that the manufacturing process of DVDRW encoding and decoding plate is simple, cost is low.
A kind of DVDRW encoding and decoding plate, wherein, the analog circuit of this DVDRW encoding and decoding plate and digital circuit all design on a double sided board, the firm and hard existing CANAL+ function of a plug-in little SCART.
The back level input of described DVDRW encoding and decoding plate is designated as first limit on one side of plate, and then level input in back is followed successively by: the TUNER that has input and output; The video input of CVBS and S terminal one; The audio frequency input of two sound channels; The video output of CVBS and S terminal one; The output of six terminals, below three from left to right be Pr/Cr, Pb/Cb, Y/G, above three from left to right be L channel, R channel, coaxial; Optical fiber output.
The input/output interface of described DVDRW encoding and decoding plate is at the integrated circuit board another side, be designated as second limit, described first limit is adjacent with second limit, the input/output interface of DVDRW encoding and decoding plate is followed successively by: the SCART input/output interface, this interface compatibility common SCART interface function and global function CANAL+ interface function; 5.1 the sound channel interface can be realized the output of 5.1 sound channels by this interface; Power interface; 1394 input interfaces; Ide interface.
The optical fiber output of described DVDRW encoding and decoding plate is adjacent with the SCART input/output interface.
Described DVDRW encoding and decoding plate with first limit with respect to one side be provided with before the control plate output interface, the CANAL+ control interface.
Three location holes of the fixedly employing of described DVDRW encoding and decoding plate and base plate.
Two location holes are at the two ends on a limit of DVDRW encoding and decoding plate, another location hole with the centre position of above-mentioned this limit adjacent edge.
The input and the output interface of described SCART plate and audio frequency and video link, and link to each other with master chip.
Compared with prior art, since the analog circuit of the DVDRW encoding and decoding plate of the utility model and digital circuit all design on a double sided board, so the integrated design of DVDRW encoding and decoding plate makes simplified manufacturing process, cost lower.
Description of drawings
Fig. 1 is a kind of electric flow chart of DVDRW encoding and decoding plate of the utility model better embodiment;
Fig. 2 is the another kind of electric flow chart of the DVDRW encoding and decoding plate of the utility model better embodiment;
Fig. 3 is the fixing schematic diagram of DVDRW encoding and decoding plate of the utility model better embodiment.
Embodiment
For the purpose, technical scheme, the advantage that make the utility model is clearer and more definite, clear, the technical scheme of the utility model is described in further detail below in conjunction with embodiment, accompanying drawing.
What the DVDRW encoding and decoding plate of the utility model adopted is that analog circuit and digital circuit all design the design at a double sided board, and expand needed function, the firm and hard existing CANAL+ function of a plug-in little SCART of while, because DVDRW encoding and decoding plate adopts integrated design, so in work simplification, reduce cost, optimize performance and there has been very big improvement aspect such as enhance productivity.。
The electric flow chart of DVDRW encoding and decoding plate such as Fig. 1 and shown in Figure 2 of the utility model better embodiment, in this better embodiment, what DVDRW encoding and decoding plate adopted is ide interface 111, it is the same playing video disc at the signal flow that carries out realizing when video disc is play with common DVD, all is to carry out the exchange of data by ide interface 111; At first be that movement reads the digital signal in the video disc, be transferred in the master chip 114 by movement interface (ide interface) 111 and decode, become the audio-video signal output of simulation then.
As shown in Figure 1, the distribution of this DVDRW encoding and decoding plate interface terminal is as described below.
This DVDRW encoding and decoding plate interface terminal is generally the top of circuit board on one side of circuit board, is designated as first limit, and then level input in back is respectively from right to left: the tuner TUNER101 that 1) has input and output; 2) input of the video of composite video CVBS and S terminal one 102; 3) input of the audio frequency of two sound channels (L channel, R channel) 103; 4) output of the video of composite video CVBS and S terminal one 104; 5) output 105 of six terminals, below three be Pr/Cr, Pb/Cb, Y/G from left to right, be coaxial, R channel, L channel; 6) optical fiber output 106.
The input/output interface of this DVDRW encoding and decoding plate is at the side of integrated circuit board, be designated as second limit, this second limit is adjacent with first limit, general second limit is the left side of circuit board, then the input/output interface of DVDRW encoding and decoding plate is followed successively by from top to bottom: 1) the SCART input/output interface 107, this interface compatibility common SCART interface function and global function CANAL+ interface function; 2) 5.1 sound channel interfaces 108 can be realized the output of 5.1 sound channels by this interface; 3) power interface 109; 4) 1394 input interfaces (USB) 110; 5) ide interface 111.
Wherein, SCART input/output interface 107 comprises 24 pins, is respectively from 1,3,5 to 23 odd number pins: TV/SCART composite video input; TV/SCART left side input; The right input of TV/SCART; TV/composite video input; The input of a TV left side; The right input of TV; The right input of SCART; The input of a SCART left side; 5 volts; The input of SCART composite video; The AV ground wire; 12 volts of standbies; Be respectively from 2,4,6 to 24 even number pins: the SCART-green; The SCART-blue signal; The SCART-danger signal; The SCART composite video; Right audio frequency; Left side audio frequency; The AV ground wire; Universaling I/O port X1; Universaling I/O port X2; The AV ground wire; 12 volts; 5 volts of standbies.
One side relative with first limit, promptly the output interface 115 of preceding control plate has been placed in the circuit board lower right corner, has placed CANAL+ control interface 116 in the middle of the right.
In the utility model, for the area utilization of the pcb board that makes DVDRW encoding and decoding plate higher, the utility model mainly designs from integrated, three location holes of fixedly employing of DVDRW encoding and decoding plate and base plate (terminal mounting panel), like this, the area utilization of the pcb board of DVDRW encoding and decoding plate is higher, more reasonable, can be as shown in Figure 3, two location hole B, C are at the two ends on a limit of DVDRW encoding and decoding plate, another location hole A with the centre position of above-mentioned this limit adjacent edge, and diagram upper end D is the installed surface of terminal.
Because the structure of above-mentioned DVDRW encoding and decoding plate can make digital video recorder realize multiple function, as recording function, editting function, multiple input mode, playback function, subscription and video recording, electronic program guides (EPG) or the like.
Recording function is meant: as long as input video and audio frequency or TV programme, digital video recorder can be saved in CD by various definition, as the 4.7GB huge capacity compact discs.Editting function: can carry out title/title deletion/title at the good content of imprinting and hide/edit operation of title picture/chapters and sections additions and deletions/chapters and sections modification etc., can carry out write-protect, prevent unexpected deletion to recorded content.Automatic channel search: can remember nearly 999 programme channels, realize automatic channel search.But automatic/hand is transferred platform, manual fine-tuning.Multiple input mode: CVBS, S-VIDEO, RF TV signal etc.Playback function: level Four is put soon, speed change is put slowly, play frame by frame, broadcast, repeat playing etc. when selecting.Subscription and video recording: the channel of can fixing time is decided the frequency quality of recording a video surely and is carried out unattended operation video recording, can be in the disposable pre-ordering setting of carrying out 20 periods.Electronic program guides (EPG): EPG is very important function of Digital Television, and the programme of simulated television can't be electronic, and EPG becomes a reality the electronization of digital television program list.We with software program and television channel by digital telegon generation effect, control all functions.The present digital TV field of EPG is state-of-the-art technology.
Wherein, the multiple course of work of digital video recorder of this preferable enforcement, describe the course of work of DVDRW encoding and decoding plate of the present utility model with the course of work that realizes the imprinting function, the course of work of other function can be with reference to this imprinting function operation process, the signal flow of this imprinting function operation process is specific as follows described, specifically can be shown in Figure 2 with reference to electric flow process.
In this better embodiment, when carrying out the imprinting function, outside audio signal at first is input to audio frequency diverter switch 118 above the integrated circuit board by the Interface Terminal SCART input/output interface 107 above the integrated circuit board, switch to correct path by software control audio frequency diverter switch 118, audio signal is input to channel audio analog/digital converter A/D119 and carries out the conversion of analog signal to digital signal then, and the audio signal of conversion can be 16bit-24bit; The digital audio and video signals of conversion is transferred to master chip 114 and encodes, lead up to ide interface 111 to the movement imprinting on video disc, the one tunnel is decoded into analog signal by master chip 114 again outputs to above the television set by S terminal output interface and composite video output interface 104 and watches; When the audio signal of outside is tuner TUNER101 input, can select the NICAM function.
Outside vision signal equally also is to be input to video switch switch 120 by the Interface Terminal above the DVDRW integrated circuit board, pass through TV/SCART composite video input interface 1 as SCART input/output interface 107, TV/SCART left side input interface 3, the right input interface 5 of TV/SCART, TV/composite video input interface 7, TV left side input interface 9, the right input interface 11 of TV, the right input interface 13 of SCART, SCART left side input interface 15, SCART composite video input interface 19, after signal is handled by the DVDRW integrated circuit board, again by the corresponding output interface output of DVDRW integrated circuit board, arrive correct path by software control diverter switch 120, vision signal after the switching is input to video a/d 121 and carries out the conversion of analog signal to digital signal, signal after the conversion is input to master chip 114 and encodes, signal behind the coding is leaded up to ide interface 111 above movement is burnt to video disc, and one the tunnel is decoded into to output to above the television set after the analog signal by master chip again and watches.
DVDRW encoding and decoding plate can be imported 1394 signals, promptly pass through the usb 1 10 of USB integrated circuit board, 1394 signals of input carry out conversion of signals by the physical chip TSB41AB1 above the integrated circuit board earlier, being input to master chip 114 then encodes, the ide interface 111 of leading up to is input to movement and carries out imprinting, one the tunnel decode by master chip 114 again after, output to television set by S terminal output interface and composite video output interface 104 again and watch.
The simulated audio signal of master chip 114 outputs can be selected 2 sound channels or 5.1 sound channels.The concrete signal flow process is to decode above digital signal that master chip 114 decoding is come out is input to channel audio analog/digital converter D/A119, and decoded analog signal is the operational amplification circuit output by the back level again.The vision signal of master chip 114 outputs directly is analog signal (total CVBS, S terminal and YCbCr/YPbPr etc. are several), and the back level is by penetrating with output after the circuit.
The systems soft ware of DVDRW encoding and decoding plate is to store by FLASH flash memory 113, can select different FLASH according to the concrete size of systems soft ware, SDRAM or DDR that the buffer memory of system adopts, as the dual-magnification technique synchronous dynamic random access memory, select different models for use according to the friction speed of system's operation and the different size of needs.
In the utility model, DVDRW integrated circuit board function ease of Use method:
1) realize the common DVD playing function: push the key that delivers from godown above the remote controller after machine powers on and starts shooting, put into the DVD video disc, push the warehouse entry key above the remote controller again, machine can be play the DVD video disc of inserting automatically.
2) realize the imprinting function: machine connects the input source of thinking imprinting after powering on and starting shooting, and pushes the input source key above the remote controller, allows machine works at correct monitor state; Push the key that delivers from godown of remote controller, but put into the video disc of imprinting, push the warehouse entry key above the remote controller then, treat that video disc runs through the imprinting key that can push above the remote controller afterwards and carries out imprinting.
3) realization of CANAL+ function: DVR DECODER, TV DECODER, three options of OTHER DECODER are arranged in setup menu, select a certain in these three options, can realize the function that the user needs according to different needs.
Though the utility model is described with reference to current better embodiment; but those skilled in the art will be appreciated that; above-mentioned better embodiment only is used for illustrating the utility model; be not to be used for limiting protection range of the present utility model; any within spirit of the present utility model and principle scope; any modification of being done, equivalence replacement, improvement etc. all should be included within the rights protection scope of the present utility model.
Claims (9)
1. DVDRW encoding and decoding plate is characterized in that: the analog circuit of this DVDRW encoding and decoding plate and digital circuit all design on a double sided board, the firm and hard existing CANAL+ function of a plug-in little SCART.
2. DVDRW encoding and decoding plate as claimed in claim 1 is characterized in that, the back level input of described DVDRW encoding and decoding plate is designated as first limit on one side of plate, and then level input in back is followed successively by: the tuner that has input and output; The video input of composite video and S terminal one; The audio frequency input of left and right two sound channels; The video output of composite video and S terminal one; The output of six terminals, below three from left to right be Pr/Cr, Pb/Cb, Y/G, above three from left to right be L channel, R channel, coaxial; Optical fiber output.
3. DVDRW encoding and decoding plate as claimed in claim 1 is characterized in that: described SCART plate comprises 24 pins: TV/SCART composite video input; TV/SCART left side input; The right input of TV/SCART; TV/composite video input; The input of a TV left side; The right input of TV; The right input of SCART; The input of a SCART left side; 5 volts; The input of SCART composite video; The AV ground wire; 12 volts of standbies; The SCART-green; The SCART-blue signal; The SCART-danger signal; The SCART composite video; Right audio frequency; Left side audio frequency; The AV ground wire; Universaling I/O port X1; Universaling I/O port X2; The AV ground wire; 12 volts; 5 volts of standbies.
4. DVDRW encoding and decoding plate as claimed in claim 2, it is characterized in that: the input/output interface of described DVDRW encoding and decoding plate is at the integrated circuit board another side, be designated as second limit, described first limit is adjacent with second limit, the input/output interface of DVDRW encoding and decoding plate is followed successively by: the SCART input/output interface, this interface compatibility common SCART interface function and global function CANAL+ interface function; 5.1 the sound channel interface can be realized the output of 5.1 sound channels by this interface; Power interface; 1394 input interfaces; Ide interface.
5. DVDRW encoding and decoding plate as claimed in claim 4 is characterized in that: the optical fiber output of described DVDRW encoding and decoding plate is adjacent with the SCART input/output interface.
6. DVDRW encoding and decoding plate as claimed in claim 2 is characterized in that: one side described DVDRW encoding and decoding plate with first limit with respect to be provided with before the control plate output interface, the CANAL+ control interface.
7. DVDRW encoding and decoding plate as claimed in claim 1 is characterized in that: described DVDRW encoding and decoding plate and base plate fixedly have three location holes.
8. DVDRW encoding and decoding plate as claimed in claim 7 is characterized in that: two location holes are at the two ends on a limit of DVDRW encoding and decoding plate, another location hole with the centre position of above-mentioned this limit adjacent edge.
9. DVDRW encoding and decoding plate as claimed in claim 1 is characterized in that: the input and the output interface of described SCART plate and audio frequency and video link, and link to each other with master chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620017694 CN200947652Y (en) | 2006-08-09 | 2006-08-09 | Digital video recorder coding and decoding board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620017694 CN200947652Y (en) | 2006-08-09 | 2006-08-09 | Digital video recorder coding and decoding board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200947652Y true CN200947652Y (en) | 2007-09-12 |
Family
ID=38734711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620017694 Expired - Fee Related CN200947652Y (en) | 2006-08-09 | 2006-08-09 | Digital video recorder coding and decoding board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200947652Y (en) |
-
2006
- 2006-08-09 CN CN 200620017694 patent/CN200947652Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: JIUZHOU ELECTRIC APPLIANCE CO., LTD., SHENZHEN CI Free format text: FORMER OWNER: LU QIANG Effective date: 20080425 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080425 Address after: Room 1701, building 518000, nonferrous building, 6013 Shennan Road, Guangdong, Shenzhen, China: Futian District Patentee after: Shenzhen Jiuzhou Electric Appliance Co., Ltd. Address before: 67, No. two, 55 street, South Road, Shuangqiao bridge, Chengdu, Sichuan, Chenghua District: 610000 Patentee before: Lu Qiang |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070912 Termination date: 20110809 |