CN204887306U

CN204887306U - Television decoder

Info

Publication number: CN204887306U
Application number: CN201520714525.1U
Authority: CN
Inventors: 林振河; 刘慧阳
Original assignee: Dongguan Lianzhou Electronic Technology Co Ltd
Current assignee: Dongguan Lianzhou Electronic Technology Co Ltd
Priority date: 2015-09-15
Filing date: 2015-09-15
Publication date: 2015-12-16
Anticipated expiration: 2025-09-15

Abstract

The utility model relates to a television decoder adopts MX608 as front end RF signal modem, turns into intermediate frequency signal with the RF signal and exports for the MSD7T01 that decodes, and the MSD7T01 that decodes turns into the TS code stream with intermediate frequency signal and transmits the processing for DSP, finally synthesizes analog signal output sound image signal, the utility model relates to a simply, with low costs, transmission rate is faster, and the signal is decoded more completely, and the bit error rate is low, the up -to -date style chipset of the bigger adoption of program receiving range for the receipt speed of digital television signal is faster, and the performance is more stable.

Description

A kind of television decoder

Technical field

The utility model relates to digital TV signal receiver technical field, is specifically related to a kind of television decoder.

Background technology

Present European standard Digital Television to be upgraded the second generation from the first generation, and namely the conversion upgrading of DVB-T to DVB-T2, enables Digital Television receive more program, obtain better reception.DVB-T2 is accurate to be errorlessly defined as: " to single television services decoder, transmit the number of times that not correctable error event occurs 1h and be less than 1 under 5Mbit/s speed ", is about as much as the Packet Error Ratio of transmission class before demultiplexing and is less than 10-7.But DVB-T2 and DVB-T coexists but incompatible, the common ground of both basic fundamental routes is CP-OFDM technology, pilot tone technology and QAM modulation technology.Support physical layer multiservice functionality relative to one of the main improvement of DVB-T, DVB-T2, two be adopt various technology to improve transmission rate, three are the technology adopting multiple raising terrestrial transmission performance, comprise a lot of option.T2 system model is that business to be transmitted is first resolved into one or more mpeg transport stream (TS) and/or general flow (GS) by input preprocessor, is then transmitted by T2 system.Input preprocessor can be the demodulation multiplexer of business separation device or transport stream, for service decomposition to be transmitted is become multiple logical data stream.Typical case's output of whole system is the single antenna signal at single radio frequency tunnel.T2 also supports MISO (enter more and singly go out) transmission mode, is launched after namely signal to be transmitted is carried out space-frequency coding by system by two transmitting antennas, and receiving terminal uses a reception antenna to receive.When supporting time-frequency fragmentation schema, it is the multiple signals transmitted at multiple radio frequency path that T2 system exports, and correspondingly, receiving terminal also needs tuner and the radio-frequency front-end of supporting multiple radio frequency path.

Present digital television decoder, receives DVB-T2 TV programme, and it is not high that existence accepts sensitivity, and transmission speed is lower, often there is the decoding of some mistakes and causes picture mosaic.

Utility model content

In order to solve the problem, the utility model provides a kind of new television decoder.

Concrete technical scheme is as follows:

A kind of television decoder, adopt MX608 as front end RF modulating and demodulating signal, RF signal is converted into intermediate-freuqncy signal and exports to decoding MSD7T01, intermediate-freuqncy signal is converted into TS bit stream to DSP process by decoding MSD7T01, final synthesis analog signal output sound image signal.

The beneficial effects of the utility model: the utility model simplicity of design, cost is low, and transmission rate is faster, signal decoding is more complete, and the error rate is low, the chipset that the larger employing of receiving scope is up-to-date, make the receiving velocity of digital television signal faster, performance is more stable.

Accompanying drawing explanation

Fig. 1 is circuit module figure of the present utility model;

Fig. 2 is circuit diagram of the present utility model.

Embodiment

Below in conjunction with accompanying drawing, embodiment of the present utility model is described further:

The utility model relates to and is called for short CVBS-Composite Video Baseband Signal; AUDIO-audio signal;

MX608-demodulator chip; MSD7T01-decoder chip

See shown in Fig. 1-2, a kind of television decoder, adopt MX608 as front end RF modulating and demodulating signal, RF signal is converted into intermediate-freuqncy signal and exports to decoding MSD7T01, intermediate-freuqncy signal is converted into TS bit stream to DSP process by decoding MSD7T01, final synthesis analog signal output sound image signal.

The utility model adopts MX608 as front end RF modulating and demodulating signal, and modulation /demodulation intermediate-freuqncy signal out, is transferred to decoding chip MSD7T01 nearby, realize the function of Fig. 1, whole mentality of designing seems just very clear, and whole process, minimum restriction decreases the decay of signal.And simplicity of design, cost is low, and transmission rate is faster, and signal decoding is more complete, and the error rate is low, the chipset that the larger employing of receiving scope is up-to-date, and make the receiving velocity of digital television signal faster, performance is more stable.

Above content is in conjunction with concrete preferred implementation further detailed description of the utility model; can not assert that concrete enforcement of the present utility model is confined to these explanations; for the utility model person of an ordinary skill in the technical field; without departing from the concept of the premise utility; some simple deduction or replace can also be made, all should be considered as belonging to protection range of the present utility model.

Claims

1. a television decoder, it is characterized in that: adopt MX608 as front end RF modulating and demodulating signal, RF signal is converted into intermediate-freuqncy signal and exports to decoding MSD7T01, intermediate-freuqncy signal is converted into TS bit stream to DSP process by decoding MSD7T01, final synthesis analog signal output sound image signal.