CN101141577B - Single channel television signal treatment connecting apparatus and dual-channel connecting method - Google Patents
Single channel television signal treatment connecting apparatus and dual-channel connecting method Download PDFInfo
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- CN101141577B CN101141577B CN200610062492A CN200610062492A CN101141577B CN 101141577 B CN101141577 B CN 101141577B CN 200610062492 A CN200610062492 A CN 200610062492A CN 200610062492 A CN200610062492 A CN 200610062492A CN 101141577 B CN101141577 B CN 101141577B
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Abstract
The present invention relates to a single channel television signal processing and relaying device and the double channel relaying method. The processing and relaying device comprises an intermediate frequency audio/video demodulation unit, and a bus interface unit, the first television audio/video data decoded and output by the demodulation unit is transferred to the computer through the bus interface unit; especially, an expansion interface is comprised, when the unit is in the first working mode, the unit receives the external second television audio/video data and transfers the data to the computer also through the bus interface unit; when the unit is in the second working mode, the unit also receives the first television audio/video data and transfers the data out though expansion interfaces. A double channel relaying path can be conveniently built by utilizing two devices of the present invention which separately worked under main and sub working mode. Thereby, a signal channel or double channel TV receiving card can be elastically realized by adopting the present invention which has the advantages that the circuit is simple, and the cost is easy to control.
Description
Technical field the present invention relates to the computer based TV signal receiver, relates in particular to the single channel processing television signals and passes that tipping is put and binary channels passes the method that connects.
The background technology binary channels receives as a kind of higher-end function, is mainly used in the telecomputer (PCTV, computer based TV signal receiver) that high-grade television receiver and latest developments get up.By this function, rating mode such as the user can realize picture-in-picture, sees while recording, double screen broadcast.
Realize on telecomputer that at present the receiving card scheme that binary channels receives mainly contains following two kinds:
1) bridge-set of the built-in binary channels audio/video demodulator of employing, the SAA7162E chip that Philips for example shown in Figure 1 company provides, receive the two-way medium-frequency TV signal IF1 and the IF2 of also demodulation two-way tuner output simultaneously, utilize the PCI-e bridge joint transport module of this built-in chip type, the two-way audio stream and the video flowing of described two passage audio/video demodulators output are sent to host computer by the PCI-e bus interface, and then realize twin-channel selection broadcast with software.PCI-e in this specification refers to PCI-Express, a kind of computer bus and interface standard.
2) adopt two-way to integrate bridge-set, the APB7202 chip that Micronas for example shown in Figure 2 company provides, receive the binary channels audio/video input signals, be integrated into corresponding audio stream and video flowing, and then be sent to host computer by the PCI-e interface, realize that with software twin-channel selection plays.Described binary channels audio/video signal is by two-way single channel TV decoding chip, for example adopts AVF4910, and the digital intermediate frequency TV signal that decoding is exported from respective tuners is obtained.
Above-mentioned the deficiencies in the prior art part is: described bridge-set SAA7162E chip, and because of built-in binary channels audio/video decoder, chip area is big, the cost height; More be not suitable for being adopted by single channel tv receiver card scheme.And concerning the two-way of external audio/video decoder was integrated bridge-set APB7202 chip, no matter in the single channel tv receiver card still is double-channel tv receiving card scheme, the number of chips of system was more, the general structure complexity, and cost is also than higher.
The summary of the invention the technical problem to be solved in the present invention is at above-mentioned the deficiencies in the prior art part, pass that tipping is put and binary channels passes the method that connects and propose a kind of single channel processing television signals, can have the low cost and the high integration designing requirement of system concurrently, both be convenient in the single channel tv receiver card, use, and be convenient to expansion again and use in double-channel tv receiving card.
For solving the problems of the technologies described above, of the present inventionly be contemplated that substantially: the processing television signals that designs a kind of built-in single channel demodulator passes tipping and puts, the bus interface that comprises a connection computer, like this, only need a tuner of increase and some peripheral elements, power supply just can make up a single channel tv receiver card; Make described device also comprise a simple expansion interface, be used for receiving the audio/video signal after the demodulation of another road, and two-way TV audio/video signal integration is become respective stream of data by this device, upload to computer by described bus interface, thereby also can use the cascade of described device to come simple construction double-channel tv receiving card.Described bus interface can be selected but be not limited to the PCI-e interface.
As the technical scheme that realizes the present invention's design be, providing a kind of single channel processing television signals to pass tipping puts, comprise an intermediate frequency audio/video demodulating unit that receives medium-frequency TV signal, one can be electrically connected the Bus Interface Unit of computer by bus interface, and first television audio of described intermediate frequency audio/video demodulating unit decoding output is uploaded to computer through described Bus Interface Unit; Especially, also comprise an extended interface unit; Put when being in first mode of operation when described single channel processing television signals passes tipping, this extended interface unit receives from second television audio of outside and also is uploaded to computer through described Bus Interface Unit; Put when being in second mode of operation when described single channel processing television signals passes tipping, this extended interface unit receives described first television audio and outwards exports by this extended interface unit.
In the such scheme, described Bus Interface Unit comprises at least 4 DMA passages, thereby by described first television audio or described second television audio and each audio data stream or the video data stream of coming are all transmitted by corresponding DMA passage.
In the such scheme, described Bus Interface Unit adopts the PCI-e interface.
In the such scheme, described single channel processing television signals passes tipping and is changed to the semiconductor single-chip; Described extended interface unit comprise a clock signal lead, a signal effectively indicate the lead-in wire and the plurality of data signal lead.
As the technical scheme that realizes the present invention's design still, provide a kind of single channel processing television signals biography binary channels that tipping is put to pass and connect method, especially, comprise step:
A., double-channel tv signal receiving card is set, this card comprises that the first single channel processing television signals passes tipping and puts, and this first single channel processing television signals passes tipping and puts and comprise an intermediate frequency audio/video demodulating unit and a Bus Interface Unit, an extended interface unit;
B. described intermediate frequency audio/video demodulating unit receives the medium-frequency TV signal of self-tuner, and decoding output first television audio;
C., the described first single channel processing television signals is set, and to pass the mode of operation that tipping puts be first mode of operation, thereby described extended interface unit receives second television audio, and is uploaded to computer through described Bus Interface Unit simultaneously with described first television audio.
In the such scheme, described double-channel tv signal receiving card comprises that also the second single channel processing television signals passes tipping and puts, and is configured to the second mode of operation work; This second single channel processing television signals passes tipping and puts reception from the medium-frequency TV signal of second tuner and produce described second television audio, passes extended interface unit output that tipping puts by this second single channel processing television signals and passes tipping toward the described first single channel processing television signals and put.
In the such scheme, the extended interface unit that the tipping of described first or second single channel processing television signals biography is put comprises a clock cable, an effective index line of signal and some single data holding wires.
In the such scheme, pass during tipping puts with the described first single channel processing television signals of the first mode of operation work, effective index line of described signal and data signal line are signal input line; Pass during tipping puts with the described second single channel processing television signals of the second mode of operation work, described clock cable is a signal input line, and effective index line of described signal and data signal line are output line.
Adopt technique scheme, no matter for single channel or multichannel tv receiver card, can use single channel processing television signals to pass to be hinged with to put and flexibly realize system architecture, and have the advantage that circuit is simple, cost is easy to control with high integration.
Description of drawings Fig. 1 is the double-channel tv receiving card structural representation of the existing SAA7162E of employing
Fig. 2 is the double-channel tv receiving card structural representation of the existing APB7202 of employing
Fig. 3 adopts the present invention to handle to pass the single channel tv receiver card structural representation that tipping is put
Fig. 4 is the structural representation of the intermediate frequency audio/video demodulating unit among Fig. 3
Fig. 5 adopts the present invention to handle to pass the double-channel tv receiving card structural representation that tipping is put
Fig. 6 be the present invention handle pass tipping put in twin-channel data flow transmission schematic diagram
Fig. 7 is the mode of operation schematic diagram of expansion interface among Fig. 5
Fig. 8 is the holding wire schematic diagram of expansion interface of the present invention
Fig. 9 is that the work schedule of each holding wire concerns schematic diagram among Fig. 8
Below the embodiment, the most preferred embodiment shown in is further set forth the present invention in conjunction with the accompanying drawings.
Single channel processing television signals of the present invention passes tipping and puts the intermediate frequency audio/video demodulating unit that comprises a reception medium-frequency TV signal, one can be electrically connected the Bus Interface Unit of computer by bus interface, and first television audio of described demodulating unit decoding output is uploaded to computer through described Bus Interface Unit; Especially also comprise an extended interface unit, second television audio that can receive from the outside also also is uploaded to computer through described Bus Interface Unit.In order to support the bandwidth of two-way TV signal, described bus interface should be able to provide the real time data stream transmittability that is no less than 60Mbyte/s (megabyte/second), therefore, can but to be not limited to be the PCI-e interface with the above bandwidth of 200Mbyte/s, for sake of convenience, various embodiments of the present invention are example with the PCI-e interface all.
Wherein, the structure of intermediate frequency audio/video demodulating unit as shown in Figure 4.It comprises the AD conversion unit (ADC) that input analog intermediate frequency TV signal is converted to digital signal, an and digital phase-locked loop (PLL, Phase Loop Lock) circuit receives this digital signal and past VSB (Vestigial Side Band, the residual sideband) filter of output; Also comprise an audio/video signal (A/V) separator, from the output signal of described VSB filter, isolate audio signal that is sent to audio demodulator and the vision signal that is sent to Video Decoder; The described television audio of described audio demodulator and Video Decoder output is uploaded to computer through described bus interface.
Like this, for single channel tv receiver card system, as shown in Figure 3, system only need comprise that a tuner is connected this tuner with one single channel processing television signals of the present invention passes tipping and puts, described intermediate frequency audio/video demodulating unit receives the medium-frequency TV signal of self-tuner, just can realize the function of single channel television reception based on computer.In this receiving card system, the expansion interface that the tipping of described single channel processing television signals biography is put can be on the shelf.
And for double-channel tv receiving card system, as shown in Figure 5, system comprises that two tuners and two single channel processing television signals of the present invention pass tipping and put.Pass the cascade use that tipping is put for the ease of described two signal processing, signal processing of the present invention passes to be hinged with to put and allows to have at least two mode of operations: first mode of operation and second mode of operation (for narrating for simplicity, being example with main mode of operation with from mode of operation respectively hereinafter).With Fig. 5 is example, for example first handle to pass tipping and put when being in main mode of operation, this first is handled and passes extended interface unit that tipping puts and receive from second television audio of outside and also first handle and pass the Bus Interface Unit that tipping puts and be uploaded to computer through this; For example handle to pass tipping and put when being in from mode of operation when second, this second is handled and passes extended interface unit that tipping puts and receive second television audio and this second television audio is outwards exported by expansion interface.Like this, concerning this illustrated TV receiving system, it has adopted binary channels of the present invention to pass and has connect method, and the method comprising the steps of:
A., double-channel tv signal receiving card is set, and this card comprises that the first single channel processing television signals passes tipping and puts;
B. this processing passes and is hinged with the medium-frequency TV signal that the intermediate frequency audio/video demodulating unit of putting receives self-tuner, and decoding output first television audio;
C., this processing is set, and to pass the mode of operation that tipping puts be main mode of operation, thereby its extended interface unit receives second television audio, and be uploaded to computer through described Bus Interface Unit simultaneously with described first television audio.
Wherein, described second television audio can pass tipping with another single channel processing television signals of the present invention and puts and produce and provide.This second processing passes to be hinged with to put and is configured to from mode of operation work, reception produces described second television audio from the medium-frequency TV signal of second tuner and by intermediate frequency audio/video demodulating unit, and then this second handle to pass that extended interface unit that tipping puts receives this second television audio and handle toward described first by expansion interface output and pass tipping and put.
Specifically as shown in Figure 7, be configured to comprise expansion interface and data stream separation module with the extended interface unit that the first processing biography tipping of main mode of operation work is put, outside audio/video data through the expansion interface input carries out data separating through the data stream separation module, produce corresponding video stream data, audio data stream or other (for example control) data flow, otherwise be sent to this processing and pass the Bus Interface Unit that tipping is put., be configured to be hinged with the extended interface unit of putting and comprise that expansion interface and data flow merge module, after data flow merging processing, export by described expansion interface by the audio or video data flow that intermediate frequency audio/video demodulating unit produces with the second processing biography from mode of operation work.
Like this, as shown in Figure 6, the present invention handles and passes the Bus Interface Unit that tipping puts and comprise at least 4 DMA (DirectMemory Access, directly memory access) passage, described first handle to pass tipping puts video that intermediate frequency audio/video demodulating unit produces or the voice data first passage of flowing through, video that extended interface unit receive to produce or the voice data second channel of flowing through, the DMA passage by correspondence transmits respectively.Related software in the computer is handled respectively each data flow that obtains through the PCI-e bus.
In the present embodiment, described second handle to pass tipping puts and can also do not replaced with the intermediate frequency audio/video demodulating equipment of Bus Interface Unit by one, this intermediate frequency audio/video demodulating equipment can comprise described extended interface unit, and be configured to from mode of operation, thereby this intermediate frequency audio/video demodulating equipment receives the medium-frequency TV signal of described second tuner output, and described second television audio of decoding generation, be sent to the tipping of described first signal processing biography through described extended interface unit and put.Because of this mode belongs to the substitute mode that is equal to of Fig. 5 embodiment, so do not add diagram in addition or give unnecessary details at this.
In order to simplify circuit to greatest extent, described expansion interface can be designed to comprise a clock cable Clk, an effective index line Valid of signal and some single data holding wires as shown in Figure 8, such as but not limited to 4 single data holding wire Dat0～3.Pass tipping and put when working with first mode of operation (for example main mode of operation) when the present invention handles, described clock cable Clk is an output line, and effective index line Valid of described signal and data signal line Dat0～3 are signal input line; Otherwise, passing tipping and put when working when the present invention handles with second mode of operation (for example from mode of operation), described clock cable Clk is a signal input line, effective index line Valid of described signal and data signal line Dat0～3 are output line.
Fig. 9 has illustrated the work schedule between described each holding wire of expansion interface to concern (certainly, can also define equal other sequential relationship of replacing with this embodiment based on existing known technology) with a specific embodiment.When the effective index line Valid of signal is significant level ' 1 ', the expression signal is effective, then notify the present invention who works in main mode of operation to handle and pass to be hinged with to put and start a data transfer cycle, data on each rising edge sampled data signal line Dat0～3 of clock cable Clk are till the effective index line Valid of this signal step-down, data transfer cycle finish.The effective index line Valid of signal uprises so each time, represents that all the new transmission cycle begins.For the clear and definite corresponding type of cycle current data stream that respectively transmits, can be address date with the first character on each transmission cycle data signal line Dat0～3, unlabeled data stream type, for example 0001 expression video flowing, 0010 expression audio stream, 0100 other data flow of expression; After following closely, what transmitted each data signal line Dat0～3 is the active traffic of the type, up to valid line step-down.The Valid line be high during the once complete data transfer cycle of representative.After having passed the data flow of current type, valid line step-down indicates current transmission to finish, and can begin new transmission cycle; When the new data arrival that detects any type, the valid line then uprises once more, and circulation repeats aforesaid process, in real time various data is sent to the first processing biography tipping and puts.The present invention handles to pass to be hinged with to put and is fit to realize with the semiconductor single-chip, use the data flow transmission mode of this merging/separation, described expansion interface only need comprise at least a clock signal lead, a signal effectively indicate the lead-in wire and the plurality of data signal lead, just can transmit all audio/videos and control data stream with less data wire, thereby reduced the needed number of pins of expansion interface, helped the selection of Chip Packaging.
The present invention can flexibly realize the simplified design of single channel or double-channel tv signal receiving card at lower cost through verification experimental verification.
Claims (12)
1. a single channel processing television signals passes to be hinged with and puts, comprise an intermediate frequency audio/video demodulating unit that receives medium-frequency TV signal, one can be electrically connected the Bus Interface Unit of computer by bus interface, and first television audio of described intermediate frequency audio/video demodulating unit decoding output is uploaded to computer through described Bus Interface Unit; It is characterized in that:
Also comprise an extended interface unit; Put when being in first mode of operation when described single channel processing television signals passes tipping, this extended interface unit receives from second television audio of outside and also is uploaded to computer through described Bus Interface Unit; Put when being in second mode of operation when described single channel processing television signals passes tipping, this extended interface unit receives described first television audio and outwards exports by this extended interface unit.
2. single channel processing television signals according to claim 1 passes tipping and puts, and it is characterized in that:
Described Bus Interface Unit comprises at least 4 DMA passages, thereby by described first television audio or described second television audio and each audio data stream or the video data stream of coming are all transmitted by corresponding DMA passage.
3. single channel processing television signals according to claim 1 passes tipping and puts, and it is characterized in that:
Described Bus Interface Unit adopts the PCI-e interface.
4. single channel processing television signals according to claim 1 and 2 passes tipping and puts, and it is characterized in that:
Described intermediate frequency audio/video demodulating unit comprises the AD conversion unit that input analog intermediate frequency TV signal is converted to digital signal, and this digital signal is through a past VSB filter of digital PLL circuit output; Also comprise an audio/video demultiplexer, from the output signal of described VSB filter, isolate audio signal that is sent to audio demodulator and the vision signal that is sent to Video Decoder; The described television audio of described audio demodulator and Video Decoder output is uploaded to computer through described Bus Interface Unit.
5. single channel processing television signals according to claim 1 passes tipping and puts, and it is characterized in that:
This single channel processing television signals passes tipping and is changed to the semiconductor single-chip; Described extended interface unit comprise a clock signal lead, a signal effectively indicate the lead-in wire and the plurality of data signal lead.
6. a single channel processing television signals biography is hinged with the binary channels biography of putting and connects method, it is characterized in that, comprises step:
A., double-channel tv signal receiving card is set, this card comprises that the first single channel processing television signals passes tipping and puts, and this first single channel processing television signals passes tipping and puts and comprise an intermediate frequency audio/video demodulating unit and a Bus Interface Unit, an extended interface unit;
B. described intermediate frequency audio/video demodulating unit receives the medium-frequency TV signal of self-tuner, and decoding output first television audio;
C., the described first single channel processing television signals is set, and to pass the mode of operation that tipping puts be first mode of operation, thereby described extended interface unit receives second television audio, and is uploaded to computer through described Bus Interface Unit simultaneously with described first television audio.
7. the binary channels that tipping is put according to the described single channel processing television signals biography of claim 6 passes and connects method, it is characterized in that:
Among the step C, each audio data stream after the shunting of described first television audio and second television audio or video data stream all the DMA passage by are separately transmitted.
8. the binary channels that tipping is put according to the described single channel processing television signals biography of claim 6 passes and connects method, it is characterized in that:
Described double-channel tv signal receiving card comprises that also the second single channel processing television signals passes tipping and puts, and is configured to the second mode of operation work;
This second single channel processing television signals passes tipping and puts reception from the medium-frequency TV signal of second tuner and produce described second television audio, passes extended interface unit output that tipping puts by this second single channel processing television signals and passes tipping toward the described first single channel processing television signals and put.
9. pass binary channels that tipping puts according to claim 6 or 8 described single channel processing television signals and pass and connect method, it is characterized in that:
The extended interface unit that the tipping of described first or second single channel processing television signals biography is put comprises a clock cable, an effective index line of signal and some single data holding wires.
10. the binary channels that tipping is put according to the described single channel processing television signals biography of claim 9 passes and connects method, it is characterized in that:
Pass during tipping puts with the described first single channel processing television signals of the first mode of operation work, described clock cable is an output line, and effective index line of described signal and data signal line are signal input line;
Pass during tipping puts with the described second single channel processing television signals of the second mode of operation work, described clock cable is a signal input line, and effective index line of described signal and data signal line are output line.
11. the binary channels that 0 described single channel processing television signals biography tipping is put according to claim 1 passes and connects method, it is characterized in that:
Described data signal line is used for transmitting the address date of the current transmission cycle data stream type of expression, and the active traffic of the type; The described transmission cycle is started by the effective index line of described signal or stops.
12. the binary channels that tipping is put according to the described single channel processing television signals biography of claim 6 passes and connects method, it is characterized in that:
The real time data stream transmittability of described Bus Interface Unit is more than or equal to 60Mbyte/s.
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| CN200610062492A CN101141577B (en) | 2006-09-04 | 2006-09-04 | Single channel television signal treatment connecting apparatus and dual-channel connecting method |
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| CN200610062492A CN101141577B (en) | 2006-09-04 | 2006-09-04 | Single channel television signal treatment connecting apparatus and dual-channel connecting method |
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| CN101141577A CN101141577A (en) | 2008-03-12 |
| CN101141577B true CN101141577B (en) | 2010-05-12 |
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| JP2011087124A (en) * | 2009-10-15 | 2011-04-28 | Panasonic Corp | Digital broadcast receiver |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1150509A (en) * | 1994-06-28 | 1997-05-21 | 汤姆森消费电子有限公司 | Signal swap apparatus for television receiver having HDTV main picture signal processor and NTSC PIX-in-PIX signal processor |
| CN2762464Y (en) * | 2004-12-17 | 2006-03-01 | 深圳清华大学研究院 | DMB-T digital TV receiver based on PCI |
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2006
- 2006-09-04 CN CN200610062492A patent/CN101141577B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1150509A (en) * | 1994-06-28 | 1997-05-21 | 汤姆森消费电子有限公司 | Signal swap apparatus for television receiver having HDTV main picture signal processor and NTSC PIX-in-PIX signal processor |
| CN2762464Y (en) * | 2004-12-17 | 2006-03-01 | 深圳清华大学研究院 | DMB-T digital TV receiver based on PCI |
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