CN204145629U

CN204145629U - A kind of receiver based on ID200

Info

Publication number: CN204145629U
Application number: CN201420492689.XU
Authority: CN
Inventors: 张宏伟
Original assignee: TAIZHOU TIANSUO INFORMATION TECHNOLOGY Co Ltd
Current assignee: TAIZHOU TIANSUO INFORMATION TECHNOLOGY Co Ltd
Priority date: 2014-08-29
Filing date: 2014-08-29
Publication date: 2015-02-04
Anticipated expiration: 2024-08-29

Abstract

The utility model discloses a kind of receiver based on ID200 belonging to technical field of digital broadcast.The RF module of this receiver is connected with ADC, and ADC and T-DMB baseband chip ID200 is connected, and T-DMB baseband chip ID200 is connected with MCU by SPI interface, and MCU is connected and is connected with USB interface.T-DMB receiver based on ID200 of the present utility model is controlled by time-sharing work, multiplexing to multiple programs in time domain, receiver can only be decoded to the program that user selects, and shut down to unselected program, thus the power consumption of receiver can be made to drop to only have less than 1/3rd of total power dissipation temporarily.

Description

A kind of receiver based on ID200

Technical field

The utility model belongs to technical field of digital broadcast, is specifically related to a kind of receiver based on ID200.

Background technology

T-DMB, as the Inheritance＆ development to DAB standard, except adopting original the used correlation technique of DAB standard, in order to carry out video broadcasting, also uses a sequence new technology.Be included in the video encoding standard MPEG-4 AVC/H.264 that video compression have employed applicable low bit speed rate video traffic, program sound accompaniment compression then adopts BSAC, and data interaction uses BIFS.The success of DAB and MPEG-4 technology effectively solves the demand of people to digital mobile TV service.

Korea S's T-DMB standard have employed the compression standard MPE-4 AVC video compression standard that still can provide Efficient Compression performance in restriction bandwidth.And in the selection of video sound accompaniment compression standard, then adopt the relatively low MPEG-4 BSAC audio compress standard of patent royalties but not AAC+.For some data services adjoint in video playback or need the occasion providing some interactive application, then employ MPEG-4 BIFS and encode.For the ease of the exploitation of commercial receiver, T-DMB uses required decoding processing capabilities in MPEG-4 compression standard to be relatively easy to framework.

T-DMB digital broadcasting experienced by the development of nearly ten years in China.Started broadcasting T-DMB program on the ground such as Beijing, Shanghai, Guangdong, and the ground such as Tianjin, Xi'an also will be opened.China Satellite Communications Corporation, on its T-DMB satellite network basis, will progressively increase L-band covered ground in national big and medium-sized cities.China covers having T-DMB maximum in the world, and maximum T-DMB terminal market, and form the large class of new IT product, market capacity will reach hundreds billion of unit.

T-DMB starts broadcasting in many countries and regions, but wants fast-developing then must solution to affect the universal most critical factor of T-DMB: receiver price and power consumption two large problems.With regard to the whole world, T-DMB acp chip is still bottleneck, and receiving terminal exploitation is seriously delayed.The price of T-DMB receiver and power consumption depend on the exploitation of acp chip.

Summary of the invention

The utility model provides a kind of receiver based on ID200, reduces power consumption and product price, is applicable to large-scale industrial production.

Based on a receiver of ID200, RF module is connected with ADC, and ADC and T-DMB baseband chip ID200 is connected, and T-DMB baseband chip ID200 is connected with MCU by SPI interface, and MCU is connected and is connected with USB interface.

The physical structure of described T-DMB baseband chip ID200 is as follows: IF interface is connected with Reed Solomn encoder, Reed Solomn encoder is connected with digital compound filter, synchronization module is connected with digital compound filter, numeral compound filter is connected with FFT calculator, FFT calculator is connected with DQPSK demodulator with timer manager respectively, DQPSK demodulator is connected with temporal frequency transducer with time-interleaved interface respectively, time-interleaved interface is connected with decoder with time-interleaved memory respectively, decoder is connected with audio decoder with data output interface respectively, audio decoder is connected with digital audio interface.

Described USB interface is connected with the DMB receiver of Based PC.

Described decoder is Viterbi decoder.

The beneficial effects of the utility model: the receiver based on ID200 of the present utility model is controlled by time-sharing work, multiplexing to multiple programs in time domain, receiver can only be decoded to the program that user selects, and unselected program is shut down temporarily, thus the power consumption of receiver can be made to drop to only have less than 1/3rd of total power dissipation, and by RF tuner module power consumption control, make RF tuner module lower power consumption 61% and lower than 61mW.

Accompanying drawing explanation

Fig. 1 is the receiver structure schematic diagram based on ID200.

Fig. 2 is T-DMB baseband chip ID200 physical structure schematic diagram.

Embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described further.

Embodiment 1

As shown in Figure 2, the physical structure of described T-DMB baseband chip ID200 is as follows: IF interface is connected with ReedSolomn encoder, Reed Solomn encoder is connected with digital compound filter, synchronization module is connected with digital compound filter, numeral compound filter is connected with FFT calculator, FFT calculator is connected with DQPSK demodulator with timer manager respectively, DQPSK demodulator is connected with temporal frequency transducer with time-interleaved interface respectively, and time-interleaved interface is connected with decoder with time-interleaved memory respectively.

Described USB interface is connected with the DMB receiver of Based PC.

Described decoder is Viterbi decoder.

The decode procedure of described T-DMB baseband chip ID200 is: first system converts the T-DMB intermediate-freuqncy signal of simulation to digital medium-frequency signal by ADC; By Reed Solomn encoder encodes; The method of recycling numeral carries out separation and the filtering of IQ component, thus obtains the OFDM time-domain signal of plural form; Next FFT is utilized to obtain the sampling point of each subcarrier and complete frequency deinterleaving; Then the result utilizing FFT to calculate carries out DQPSK demodulation and deadline deinterleaving; Finally carry out channel-decoding with Viterbi decoder, thus recover T-DMB source data.

This receiver has audio/video decoder based on mobile phone, i.e. Streaming Media process chip, realizes T-DMB digital TV mobile phone just than being easier to, and only needs ID200 chip and RF chip, and ADC, can be placed on mobile phone PCB.Have cost advantage low and low in energy consumption by the program, fringe cost can control below 10 dollars, and shortcoming will run RS software on mobile phone CPU, needs to provide RS program and hardware and software support.

If mobile phone does not have audio/video decoder, still can be placed in mobile phone by T-DMB module, operation RS software and audio/video decoder realize audio/video decoding under an operating system.Need to provide self-editing audio/video decoding software, require that hardware has corresponding storage and operational capability.

Time-sharing work control is an important performance of T-DMB decoder, and it can make the power consumption of T-DMB receiver greatly reduce.It is multiplexing that T-DMB encoder have employed to multiple programs in time domain, T-DMB receiver can only be decoded to the program that user selects in principle, and to unselected program interim " shutdown ", thus the power consumption of receiver can be made to drop to only have less than 1/3rd of total power dissipation.Although in principle can time-sharing work, do not have a T-DMB decoding chip to realize timesharing decoding so far, more do not have chip can carry out Time-sharing control to RF tuner module.ID200 is the baseband chip accomplishing that time-sharing work controls, and not only oneself power consumption reduces, and by RF tuner module power consumption control, make RF tuner module lower power consumption 61% and lower than 61mW.

Claims

1. based on a receiver of ID200, it is characterized in that, RF module is connected with ADC, and ADC and T-DMB baseband chip ID200 is connected, and T-DMB baseband chip ID200 is connected with MCU by SPI interface, and MCU is connected and is connected with USB interface.

2. a kind of receiver based on ID200 according to claim 1, it is characterized in that, the physical structure of described T-DMB baseband chip ID200 is as follows: IF interface is connected with Reed Solomn encoder, Reed Solomn encoder is connected with digital compound filter, synchronization module is connected with digital compound filter, numeral compound filter is connected with FFT calculator, FFT calculator is connected with DQPSK demodulator with timer manager respectively, DQPSK demodulator is connected with temporal frequency transducer with time-interleaved interface respectively, time-interleaved interface is connected with decoder with time-interleaved memory respectively.

3. a kind of receiver based on ID200 according to claim 2, it is characterized in that, described decoder is Viterbi decoder.

4. a kind of receiver based on ID200 according to claim 1, it is characterized in that, described USB interface is connected with the DMB receiver of Based PC.