CN1980336A - Digit-analogue integrated receiver - Google Patents
Digit-analogue integrated receiver Download PDFInfo
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- CN1980336A CN1980336A CNA2005101020889A CN200510102088A CN1980336A CN 1980336 A CN1980336 A CN 1980336A CN A2005101020889 A CNA2005101020889 A CN A2005101020889A CN 200510102088 A CN200510102088 A CN 200510102088A CN 1980336 A CN1980336 A CN 1980336A
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- 238000012545 processing Methods 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims abstract description 7
- 230000005236 sound signal Effects 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 4
- 230000006837 decompression Effects 0.000 claims description 2
- 230000003139 buffering effect Effects 0.000 abstract 1
- 210000000352 storage cell Anatomy 0.000 abstract 1
- 230000006872 improvement Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 241000533950 Leucojum Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
Digital and analog integrated receiver includes following parts: analog signal tuner for receiving analog broadcast signal, analog intermediate frequency processing unit (AIFPU) connected to the analog signal tuner, tuning/demodulating unit for receiving digital broadcast signal, decoder connected to the tuning/demodulating unit, TV process unit connected to decoder and AIFPU electrically, and respectively, storage cell connected to decoder and in use for storing program and buffering data. The integrated receiver can receive and process digital broadcast signal as well as receive and process analog broadcast signal. Selecting and switching audio and video output from AIFPU or decoder, TV process unit gives one final selected output to display and audio playing back unit. Features are: high system integrity, and low cost.
Description
[technical field]
The present invention's design relates to TV technology, especially relates to a kind of digit-analogue integrated receiver.
[background technology]
In the world the existing analogue color TV be with the condition of black-and-white TV compatibility under grow up, its definition and bandwidth applications are very limited, exist can not repeatedly duplicate, definition is low, flicker, light tone are gone here and there mutually, can not long-distance communications and the shortcoming of anti-multipath interference performance difference.From the angle of spectrum application, simulation PAL TV can only transmit one road analog video signal and one tunnel audio signal in 8,000,000 bandwidth.
Digital Television is that traditional simulated television information is changed into binary digital information, handles then, through receiving, decode, convert to the AV signal, is transferred to every household by existing cable network.Digital Television is the product after television digitization and the networking.With respect to traditional simulated television, it can receive more TV programme and other digital informations.Its picture quality can reach the quality level of DVD, and sound quality is also very high.Because transmission process for digital signal is not subject to disturb, when watching Digital Television, the user do not have phenomenons such as the frequent snowflake that occurs of simulated television, ghost image.
There are three ripe relatively standard systems participating in global standard competition at present in global digital television broadcasting field.They are the DVB (digital video broadcasting) in Europe, the ATSC (Advanced Television Systems Committee) of the U.S. and the ISDB (Integrated Services Digital Broadcasting) of Japan.Separate between the three, in specific separately application, have the advantage of oneself.DVB is most widely used among the three and standard flexibly, and has started in Europe and implement.In our country, the part city has begun the digital signal emission test of DVB, but currently can not turn-off all at China's simulated television, existing television set mostly is single simulated television of signal source or digital television, or realize playing the function of Digital Television by outside simulated television, adding a set-top box, so be badly in need of a kind of DA compatibility receiver, but both receiving digital signals also can receive analog signal.
[summary of the invention]
Technical problem to be solved by this invention is: a kind of digit-analogue integrated receiver is provided, gets final product receiving digital signals, also can receive analog signal, have the level of integrated system height simultaneously, characteristics such as cost is lower.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of digit-analogue integrated receiver comprises:
The analog signal tuner, it receives analog broadcast signal, with input radio frequency RF signal convert to the medium-frequency IF signal,
The analog intermediate frequency processing unit, its medium-frequency IF signal from the output of analog signal tuner demodulates Voice ﹠ Video, and wherein, this digit-analogue integrated receiver also comprises:
Tuning, demodulating unit are used for receiving digital broadcast signal, convert input radio frequency RF signal to the medium-frequency IF signal, then with medium-frequency IF signal demodulation output transport stream TS;
Decoder, its demultiplexing, decompression are by transport stream TS tuning, demodulating unit output, and vision signal obtains digital signal after decoder processes, and decoded voiceband data signal is through the digital to analog converter output audio signal;
The TV processing unit, its audio frequency and video that analog intermediate frequency processing unit is exported are handled, and select to switch with the YUV signal of decoder output, finally select one the tunnel to export to the display demonstration;
Memory cell is electrically connected with decoder, the buffer memory when being used for the storage system program or being used for program running, video decode.
Further improvement in the technical proposal is: this is tuning, demodulating unit is a DVB integrated digital tuner, comprises high-frequency tuning module and OFDM demodulation module.
Further improvement in the technical proposal is: decoder is a MPEG-2 decoding chip, and it is output as YUV digital video signal and binaural audio signal.
Further improvement in the technical proposal is: during work, this TV processing unit is main equipment Master, and decoder is slave unit Slave, and described TV processing unit and decoding unit are realized communication by the I2C bus.
Further improvement in the technical proposal is: this memory cell comprises FLASH storage, is used for the control program of storage system.
Further improvement in the technical proposal is: this memory cell comprises SDRAM storage, the buffer memory during as program running and video decode.
Further improvement in the technical proposal is: this TV processing unit comprises infrared input port and panel operating key input port.
The invention has the beneficial effects as follows: because digit-analogue integrated receiver of the present invention comprises tuning/demodulating unit, decoder, analog signal tuner, analog intermediate frequency processor and TV processing unit, therefore can either receive and handle digital broadcast signal, also can receive and the treatment of simulated broadcast singal, and by the TV processing unit to selecting to switch by sound, the video of the output of analog intermediate frequency processor or decoder respectively, finally select one the tunnel to export to display and audio playing unit; Characteristics such as the present invention simultaneously also has the level of integrated system height, and cost is lower.
[description of drawings]
Fig. 1 is the functional-block diagram of digit-analogue integrated receiver of the present invention.
[embodiment]
The invention will be further described below in conjunction with accompanying drawing.
As shown in Figure 1, a kind of digit-analogue integrated receiver of the present invention comprises the tuning/demodulating unit of receiving digital broadcast signal, the decoder that is connected with tuning/demodulating unit, receives the analog signal tuner of analog broadcast signal, the analog intermediate frequency processing unit that is connected with the analog signal tuned cell, respectively the TV processing unit that is electrically connected with decoder and analog intermediate frequency processing unit, be connected the memory cell that is used for procedure stores and metadata cache with decoder.
This is tuning, demodulating unit is used for receiving digital broadcast signal, converts input radio frequency RF signal to medium-frequency IF signal (38MHZ), then with medium-frequency IF signal demodulation output transport stream TS.This is tuning, demodulating unit is a DVB integrated digital tuner, comprises high-frequency tuning module and OFDM demodulation module.
This decoder (normally model is the chip of STI5518) is used for demultiplexing, decompresses by transport stream TS tuning, demodulating unit output, vision signal obtains digital video signal after decoder processes, decoded voiceband data signal is through the digital to analog converter output audio signal.This decoder is a MPEG-2 decoding chip, is output as YUV digital video signal and binaural audio signal.
This analog signal tuner is used to receive analog broadcast signal, converts input radio frequency RF signal to the medium-frequency IF signal.
This analog intermediate frequency processing unit (normally model is the chip of TDA9808) is used for demodulating Voice ﹠ Video from the medium-frequency IF signal of analog signal tuner output.
This TV processing unit (normally Philips company model is the chip of TDA9358) is used for sound, the video of the output of analog intermediate frequency processing unit are handled, and and sound, the vision signal of decoder output select to switch, finally select one the tunnel to export to display and show.During work, this TV processing unit is main equipment Master, and decoder is slave unit Slave, and described TV processing unit and decoding unit are realized communication by the I2C bus.
Buffer memory when this memory cell is used for the storage system program or is used for program running, video decode.This memory cell comprises FLASH storage, is used for the control program of storage system; One SDRAM storage, the buffer memory during as program running and video decode.
This TV processing unit also comprises infrared input port and panel operating key input port.The user can be by remote controller or if operating key on the panel selects to switch broadcast mode, and can show by LED and select and switching result.
Because digit-analogue integrated receiver of the present invention comprises tuning/demodulating unit, decoder, analog signal tuner, analog intermediate frequency processor and TV processing unit, therefore can either receive and handle digital broadcast signal, also can receive and the treatment of simulated broadcast singal, and by the TV processing unit to selecting to switch by sound, the video of the output of analog intermediate frequency processor or decoder respectively, finally select one the tunnel to export to display and audio playing unit; Characteristics such as the present invention simultaneously also has the level of integrated system height, and cost is lower.
Claims (7)
1, a kind of digit-analogue integrated receiver comprises:
The analog signal tuner, it receives analog broadcast signal, with input radio frequency RF signal convert to the medium-frequency IF signal,
The analog intermediate frequency processing unit, its medium-frequency IF signal from the output of analog signal tuner demodulates Voice ﹠ Video, and it is characterized in that: this digit-analogue integrated receiver also comprises:
Tuning, demodulating unit are used for receiving digital broadcast signal, convert input radio frequency RF signal to the medium-frequency IF signal, then with medium-frequency IF signal demodulation output transport stream TS;
Decoder, its demultiplexing, decompression are by transport stream TS tuning, demodulating unit output, and vision signal obtains digital signal after decoder processes, and decoded voiceband data signal is through the digital to analog converter output audio signal;
The TV processing unit, its audio frequency and video that analog intermediate frequency processing unit is exported are handled, and select to switch with the YUV signal of decoder output, finally select one the tunnel to export to the display demonstration;
Memory cell is electrically connected with decoder, the buffer memory when being used for the storage system program or being used for program running, video decode.
2, digit-analogue integrated receiver as claimed in claim 1 is characterized in that: this is tuning, demodulating unit is a DVB integrated digital tuner, comprises high-frequency tuning module and OFDM demodulation module.
3, digit-analogue integrated receiver as claimed in claim 1 is characterized in that: decoder is a MPEG-2 decoding chip, and it is output as YUV digital video signal and binaural audio signal.
4, digit-analogue integrated receiver as claimed in claim 1 is characterized in that: during work, this TV processing unit is main equipment Master, and decoder is slave unit Slave, and described TV processing unit and decoding unit are realized communication by the I2C bus.
5, digit-analogue integrated receiver as claimed in claim 1 is characterized in that: this memory cell comprises FLASH storage, is used for the control program of storage system.
6, digit-analogue integrated receiver as claimed in claim 1 is characterized in that: this memory cell comprises SDRAM storage, the buffer memory during as program running and video decode.
7, digit-analogue integrated receiver as claimed in claim 1 is characterized in that: this TV processing unit comprises infrared input port and panel operating key input port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005101020889A CN1980336A (en) | 2005-12-01 | 2005-12-01 | Digit-analogue integrated receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005101020889A CN1980336A (en) | 2005-12-01 | 2005-12-01 | Digit-analogue integrated receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1980336A true CN1980336A (en) | 2007-06-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005101020889A Pending CN1980336A (en) | 2005-12-01 | 2005-12-01 | Digit-analogue integrated receiver |
Country Status (1)
| Country | Link |
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| CN (1) | CN1980336A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102263983A (en) * | 2011-04-14 | 2011-11-30 | 青岛海信信芯科技有限公司 | SOC (System on a Chip) verification method and debugging tool for radio frequency signals |
| CN101521550B (en) * | 2008-02-26 | 2012-03-14 | 启碁科技股份有限公司 | Embedded multimedia system and related digital broadcasting demodulating device thereof |
-
2005
- 2005-12-01 CN CNA2005101020889A patent/CN1980336A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101521550B (en) * | 2008-02-26 | 2012-03-14 | 启碁科技股份有限公司 | Embedded multimedia system and related digital broadcasting demodulating device thereof |
| CN102263983A (en) * | 2011-04-14 | 2011-11-30 | 青岛海信信芯科技有限公司 | SOC (System on a Chip) verification method and debugging tool for radio frequency signals |
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Open date: 20070613 |