CN1658128A - Audio-visual signal transmission and processing device - Google Patents

Abstract

A audio-video signal transmission-reception processing device comprises an audio-video decoder, a bridge and a bus interface, wherein the bus interface comprises a PCMCIA, CardBus or Express Card bus interface. The audio-video decoder is used for receiving a corresponding analog image signal and a corresponding analog sound signal and outputting a corresponding first digital image signal and a corresponding first digital sound signal according to the analog image signal and the analog sound signal. The bridge is used for receiving the first digital image signal and the first digital sound signal, and respectively outputting a second digital image signal and a second digital sound signal which accord with a bus interface specification so as to output the signals to a computer through a bus interface corresponding to the bus interface specification.

Description

Audio-visual signal transmission and processing device

technical field

The present invention relates to an audio-visual signal transmission and processing device, and in particular to an audio-visual signal transmission device that decodes received analog image signals and analog sound signals into digital image signals and digital sound signals and outputs them to a computer. Connect to the processing device.

Background technique

In today's era of rapid technological development, computers have become an indispensable part of modern people's daily life. Because computers can only play digital audio-visual signals, the analog TV audio-visual signals output by current TV stations cannot be directly played on computers. Therefore, some organizations have developed audio-visual signal transmission and processing devices to encode analog TV audio-visual signals into digital audio-visual signals that can be played by computers.

The currently widely used audio-visual signal transmission and processing device on the market is, for example, a TV tuner card or a TV capture card, which allows users to watch TV signals on a computer screen. However, general TV cards are all PCI interfaces, which are mainly used in desktop computers, and do not have the function of hot plugging (hot plug). On the other hand, a currently relatively new TV card is the CardBus interface, which is mainly used in notebook computers, as shown in Figure 1 below. Although it has a hot-swappable function, its method of signal processing is to use hardware compression (hardware encode) method, so the hardware components used are relatively large, and the cost is relatively increased.

Please refer to FIG. 1 , which shows a circuit block diagram of a traditional audio-visual signal transmission and processing device. In Fig. 1, the audio-visual signal transmission and processing device 10 includes an audio-visual encoder (video & audio encoder, AV encoder) 18, a CardBus bus interface (bus interface) 13, an image decoder (decoder) 11, a sound decoder 16 , a demodulator (tuner) 15, a multiplexer (multiplexcr) 17 and an audio analog/digital converter (analogy/digital converter, ADC) 26. Wherein, the image decoder 11 can be a Philips SAA7113 decoder, and the sound analog/digital converter 12 can be an AKM5355 analog/digital converter, and the audio-visual encoder 18 can be a Fujitsu MB86393A Mpeg2 encoder. In addition, the demodulator 15 can be a demodulator produced by Sony Corporation, and the sound decoder 16 can be an AN5833 SAP decoder.

The demodulator 15 is used to receive an analog TV audio-visual signal T, and output an analog video signal Va and an analog audio intermediate frequency signal Aa accordingly when being demodulated. The image decoder 11 is used to receive the analog image signal Va, and output a digital image signal Vd to the audio-visual encoder 18 accordingly. The audio decoder 16 is used to receive the analog IF audio signal Aa, and decode and output an analog right audio signal AaR1 and an analog left audio signal AaL1 to the multiplexer 17 accordingly.

The video decoder 11 can receive an analog video signal from a VCR, such as an analog S video signal Vas or an analog V video signal Vav. The multiplexer 17 can receive an analog right audio signal AaR2 and an analog left audio signal AaL2 corresponding to the analog S image signal Vas or the analog V image signal Vav output by the VCR. The video decoder 11 can receive the analog S video signal Vas or the analog V video signal Vav, and output a digital S video signal Vds or a digital V video signal Vdv accordingly. The multiplexer 17 outputs an analog right audio signal AaR and an analog left audio signal AaL to the audio analog/digital according to the analog right audio signal AaR1 and the analog left audio signal AaL1 or based on the analog right audio signal AaR2 and the analog left audio signal AaL2 Converter 12. The audio analog/digital converter 12 is used to receive the analog right audio signal AaR and the analog left audio signal AaL, and output a digital audio signal Ad to the audio image encoder 18 accordingly.

The audio-visual encoder 18 receives and encodes the digital image signal Vd and the digital audio signal Ad, and outputs a digital audio-visual signal X, such as an Mpeg2 audio-visual signal. In addition, the audio-visual encoder 18 can receive and encode the digital audio signal Ad, the digital S video signal Vds or the digital V video signal Vdv, and output another digital audio-visual signal Y, such as another Mpeg2 audio-visual signal. The audio-visual encoder 18 transmits the digital audio-visual signal X or Y to a computer 14, such as a notebook computer, through the PCMCIA bus interface 13. At this time, the computer 14 can store or play the digital audio-visual signal X or Y.

As can be seen from the above, the audio-visual signal transmission and processing device 10 must use several hardware components such as the image decoder 11, the audio decoder 16, the audio analog/digital converter 11, and the audio-visual encoder 18 to transmit the analog image signal. The original data (raw data) such as analog sound signal are coded into digital audio-visual signal and output to computer 14. However, since the number of hardware components used in the audio-visual signal transmission and processing device 10 is relatively large, and the sources of each hardware component are different, the production cost of the audio-visual signal transmission and processing device 10 will relatively increase a lot.

Contents of the invention

In view of this, the object of the present invention is to provide an audio-visual signal transmission and processing device. It decodes the received analog image signal and analog sound signal into digital image signal and digital sound signal and outputs it to the design of the computer, which is completely applied to PCMCIA, CardBus or Express Card bus interface for digital signals such as digital image signal, digital sound signal High-speed transmission capabilities of raw data such as digital audio-visual signals and digital broadcasting signals, and high computing power applied to computers to encode digital image signals and digital audio signals into digital audio-visual signals. Therefore, it is possible to reduce the number of hardware components used by the present invention, and to reduce a lot of production costs.

According to the purpose of the present invention, a kind of audio-visual signal transmission and processing device is proposed, including audio-visual decoder, a bridge and a bus interface, wherein the bus interface includes PCMCIA, CardBus or ExpressCard bus interface. The audio-visual decoder is used for receiving a corresponding analog image signal and an analog audio signal, and outputting a corresponding first digital image signal and a first digital audio signal accordingly. The bridge is used to receive the first digital image signal and the first digital audio signal, and respectively output a second digital image signal and a second digital audio signal conforming to a bus interface specification, so as to pass through a bus interface corresponding to the bus interface specification output to a computer.

According to another object of the present invention, an audio-visual signal transmission and processing device is proposed, including a bridge and a bus interface, wherein the bus interface includes PCMCIA, CardBus or Express Card bus interface. The bridge is used to receive a first digital audio-visual signal, convert the first digital audio-visual signal into a second digital audio-visual signal conforming to a bus interface specification, and output it to the computer via a bus interface corresponding to the bus interface specification .

According to another object of the present invention, an audio-visual signal transmission and processing device is proposed, including a bridge and a bus interface, wherein the bus interface includes PCMCIA, CardBus or Express Card bus interface. The bridge is used to receive a first digital broadcast signal, convert the first digital broadcast signal into a second digital broadcast signal conforming to a bus interface specification, and output it to the computer through a bus interface corresponding to the bus interface specification.

Description of drawings

In order to make the above-mentioned purposes, features, and advantages of the present invention more comprehensible, a preferred embodiment is specifically cited below, together with the accompanying drawings, and the details are as follows:

Fig. 1 shows a circuit block diagram of a conventional audio-visual signal transmission and processing device.

FIG. 2 shows a circuit block diagram of an audio-visual signal transmission and processing device according to an embodiment of the present invention.

Explanation of reference numbers

10, 20: Audio-visual signal transmission and processing device

11: Image decoder

12: Sound analog/digital converter

13: CardBus interface

14, 24: Computer

15, 25, 26: demodulator

16: Sound decoder

17: Multiplexer

18: Audio and video encoder

21: Audio and video decoder

22: Bridge

23: bus interface

Detailed ways

Please refer to FIG. 2 , which shows a circuit block diagram of an audio-visual signal transmission and processing device according to an embodiment of the present invention. In Fig. 2, audio-visual signal transmission and processing device 20 comprises audio-visual decoder (video&audio decoder, AV decoder) 21, a bridge (bridge) 22, a bus interface (businterface) 23 and demodulator (tuner) 25 and 26. In the present invention, the bus interface 23 is a PCMCIA, CardBus or Express Card bus interface.

The demodulator 25 is used to receive an analog TV audio-visual signal T from an antenna or a cable, and output an analog image signal Va and an analog audio signal Aa accordingly when being demodulated. The demodulator 26 is used to receive an analog frequency modulation (FM) broadcast signal B from an antenna or a cable, and output an analog broadcast signal Aab accordingly when being demodulated.

The audio-visual decoder 21 receives the analog broadcast signal Aab, and outputs a digital broadcast signal Adb to the bridge 22 accordingly. In addition, the audio-visual decoder 21 receives the corresponding analog image signal Va and the analog audio signal Aa, and outputs a corresponding digital image signal Vd and a digital audio signal Ad to the bridge 22 accordingly. Wherein, the analog audio signal Aa may include an analog right audio signal and an analog left audio signal. In one embodiment, the audio-image decoder 21 can decode the analog audio signal Aa into at least one analog right audio signal and one analog left audio signal. Next, the audio-visual decoder 21 converts the decoded analog right audio signal and analog left audio signal into a digital left and right audio signal AdLR, and outputs it to the bridge 22 .

The bridge 22 is used to receive the digital broadcast signal Adb and/or the corresponding digital image signal Vd and digital audio signal Ad outputted by the audio-visual decoder 21, and convert it into a digital broadcast signal conforming to the bus interface specification of the bus interface 23. Signal Adb and/or digital image signal Vd and digital sound signal Ad that conform to a bus interface specification are output to computer 24 via bus interface 23, wherein, computer 24 is for example a desktop computer, a notebook computer, a laptop A portable computer or a palmtop computer is preferably applied on a notebook computer, and the bus interface specification is such as PCMCIA, CardBus or Express Card bus interface specification. The computer 24 receives and encodes the corresponding digital image signal Vd and digital audio signal Ad, and generates a digital audio-visual signal, such as an Mpeg2 audio-visual signal. At this time, the computer 24 can store or play the encoded digital audio-visual signal. In addition, the computer 24 can receive and store or play the digital broadcast signal Adb output by the bus interface 23 .

The above is the situation when the signal source is an analog signal, which must be converted into a digital signal by the audio-visual decoder 21; however, if the signal source is a digital signal, such as a digital audio-visual signal D and/or a digital broadcast signal E, this Otherwise, it does not need to be decoded by the audio-visual decoder 21 , so the audio-visual signal transmission processing device 20 uses the bridge 22 to directly receive the digital audio-visual signal D and/or the digital broadcast signal E. Wherein, the digital audio-visual signal D may be a transport stream (TS) audio-visual signal, an Mpeg2 audio-visual signal or any other type of digital audio-visual signal such as any compressed digital audio-visual signal. The bridge 22 converts the received digital audio-visual signal D and/or digital broadcast signal E into a digital audio-visual signal D and/or digital broadcast signal E conforming to the bus interface specification of the bus interface 23, so as to be output to the computer24. Then, the computer 24 can store or play the received digital audio-visual signal D and/or digital broadcast signal E.

The audio-visual decoder 21 can receive a corresponding analog image signal and an analog sound signal from an analog audio-visual output device, and the analog audio-visual output device can be a video game, a digital camera, a digital video recorder, a video recorder , VCD player or DVD player. Wherein, the analog image signal output by the analog audio-visual output device may be an analog S image signal Vas or an analog V image signal Vav, and the analog sound signal relative to the analog S image signal Vas or the analog V image signal Vav at least includes an analog A right audio signal AaR and an analog left audio signal AaL. The audio-image decoder 21 decodes the received analog right audio signal AaR and analog left audio signal AaL, and outputs a digital left and right audio signal AdLR to the bridge 22 accordingly. In addition, the audio-visual decoder 21 decodes the received analog S video signal Vas or analog V video signal Vav, and outputs the digital S video signal Vds or the digital V video signal Vdv to the bridge 22 accordingly. The bridge 22 converts the received digital left and right sound signal AdLR, digital S image signal Vds or digital V image signal Vdv into corresponding digital signals conforming to the bus interface specification of the bus interface 23, so as to output to the computer 24 via the bus interface 23 . Finally, after being processed by the computer, the computer 24 can store or play the received digital left and right audio signal AdLR, digital S image signal Vds or digital V image signal Vdv.

However, those skilled in the art can also understand that the technology of the present invention is not limited thereto. For example, the audio-visual decoder 21 may further include an image decoding unit and an audio analog/digital conversion unit. Wherein, the image decoding unit is used to receive all analog image signals, and output corresponding digital image signals to the bridge 22 accordingly. The audio analog/digital conversion unit is used to receive all analog audio signals or analog broadcast signals, and output corresponding digital audio signals or digital broadcast signals to the bridge 22 accordingly.

Because the bandwidth of bus interface 23 that the present invention adopts such as PCMCIA, CardBus or Express Card bus interface is very big and transmission speed is also very fast, makes bus interface 23 can be very smoothly digital image signal, digital sound signal, digital sound image The original data (raw data) such as signals and digital broadcasting signals are output to the computer 24 without causing a transmission delay (delay) of the original data. In addition, the computer 24 can use its computing power to compress and encode the received digital image signal and digital audio signal into a digital audio-visual signal, fully applying the high computing efficiency of the computer 24 itself. Therefore, the number of hardware components used by the audio-visual signal transmission processing device 20 can be reduced, and many production costs can be reduced.

The audio-visual signal transmission and processing device disclosed in the above-mentioned embodiments of the present invention, which decodes the received analog image signal and analog sound signal into digital image signal and digital sound signal and outputs it to the design of the computer, is fully applied to PCMCIA/CardBus The /Express Card bus interface has high-speed transmission capabilities for original data, and is applied to computers to compress and encode digital image signals and digital audio signals into high computing capabilities for digital audio-visual signals. Therefore, it is possible to reduce the number of hardware components used by the present invention, and to reduce a lot of production costs.

In summary, although the present invention has been disclosed as above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can carry out various methods without departing from the spirit and scope of the present invention. Changes and modifications, therefore, the protection scope of the present invention should be determined by the scope defined by the proposed claims.

Claims (19)

1. An audio-visual signal transmission and processing device, comprising: an audio-visual decoder, used to receive a corresponding analog image signal and an analog audio signal, and output a corresponding first digital image signal and a first digital audio signal accordingly; and A bridge, used to receive the first digital image signal and the first digital audio signal, and respectively output a second digital image signal and a second digital audio signal conforming to a bus interface specification, to pass through the corresponding bus interface A bus interface of the specification is output to a computer; Wherein, the bus interface includes PCMCIA or CardBus or Express Card bus interface. 2. The audio-visual signal transmission and processing device as claimed in claim 1, wherein the computer encodes the received second digital image signal and the second digital audio signal into a third digital audio-visual signal. 3. The audio-visual signal transmission and processing device as claimed in claim 2, wherein the third digital audio-visual signal is an Mpeg2 audio-visual signal. 4. The audio-visual signal transmission processing device as claimed in claim 1, wherein the audio-visual decoder decodes the received analog audio signal into at least one analog right audio signal and an analog left audio signal, and the audio image The decoder converts the decoded analog right sound signal and the analog left sound signal into a digital left and right sound signal and outputs it to the bridge. 5. The audio-visual signal transmission and processing device as claimed in claim 1, wherein the audio-visual signal transmission and processing device further comprises: A demodulator is used to receive an analog TV audio-visual signal, and output the analog image signal and the analog audio signal to the audio-visual decoder when being demodulated. 6. The audio-visual signal transmission processing device as claimed in claim 1, wherein the analog image signal is an analog S image signal, and the analog sound signal at least includes an analog right sound signal corresponding to the analog S image signal and An analog left audio signal. 7. The audio-visual signal transmission processing device as claimed in claim 1, wherein the analog image signal is an analog V image signal, and the analog sound signal at least includes an analog right sound signal corresponding to the analog V image signal and An analog left audio signal. 8. The audio-visual signal transmission and processing device as claimed in claim 1, wherein the bridge further includes a fourth digital audio-visual signal capable of receiving a digital signal source different from the audio-visual decoder, and converting the The fourth digital audio-visual signal is converted into a fifth digital audio-visual signal conforming to the specification of the bus interface to be output to the computer via the bus interface. 9. The audio-visual signal transmission and processing device according to claim 8, wherein the fourth digital audio-visual signal comprises a transport stream audio-visual signal, an Mpeg2 audio-visual signal or any other type of digital audio-visual signal. 10. The audio-visual signal transmission and processing device according to claim 1, wherein the bridge further includes a first digital broadcast signal capable of receiving a digital signal source different from the audio-visual decoder, and converting the first digital broadcast signal A digital broadcast signal is converted into a second digital broadcast signal conforming to the specification of the bus interface to be output to the computer through the bus interface. 11. The audio-visual signal transmission processing device as claimed in claim 1, wherein the audio-visual decoder further receives an analog broadcast signal and outputs a digital broadcast signal to the bridge accordingly. 12. The audio-visual signal transmission and processing device as claimed in claim 11, wherein the audio-visual signal transmission and processing device further comprises: A demodulator is used for receiving an analog FM broadcast signal and outputting the analog broadcast signal when being demodulated. 13. The audio-visual signal transmission and processing device according to claim 1, wherein the computer is a desktop computer or a notebook computer. 14. The audio-visual signal transmission and processing device as claimed in claim 1, wherein the analog audio signal comprises an analog left audio signal and an analog right audio signal. 15. An audio-visual signal transmission processing device, comprising a bridge, the bridge is used to receive a first digital audio-visual signal, and convert the first digital audio-visual signal into a second digital audio-visual signal conforming to a bus interface specification The digital audio-visual signal is output to a computer via a bus interface corresponding to the bus interface specification, wherein the bus interface includes PCMCIA or CardBus or Express Card bus interface. 16. The audio-visual signal transmission processing device according to claim 15, wherein the first digital audio-visual signal comprises a transport stream audio-visual signal, an Mpeg2 audio-visual signal or any other type of digital audio-visual signal. 17. The audio-visual signal transmission and processing device as claimed in claim 15, wherein the computer is a desktop computer or a notebook computer. 18. An audio-visual signal transmission and processing device, comprising a bridge, which is used to receive a first digital broadcast signal, and convert the first digital broadcast audio-visual signal into a second digital broadcast signal conforming to a bus interface specification The digital broadcast signal is output to a computer through a bus interface corresponding to the bus interface specification, wherein the bus interface includes PCMCIA or CardBus or Express Card bus interface. 19. The audio-visual signal transmission and processing device as claimed in claim 18, wherein the computer is a desktop computer or a notebook computer.

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