Five-in-one tuner for television signals

A technology for TV signals and tuners, which is applied in the parts of color TVs, parts of TV systems, TVs, etc., can solve the problems of increasing the design difficulty of the whole TV set, complicated tuner circuits, and difficult lightweight and thin design, etc. Simple and convenient design and production, simple circuit composition and simple debugging effect

Active Publication Date: 2011-09-14
EARDA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, the RF part of digital TV reception and analog TV reception in the 45MHz-860MHz segment is difficult to take into account DVB-T, DVB-C and ATV because of the indicators, usually two tuners are used to process them separately, and two intermediate frequencies a...

Method used

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  • Five-in-one tuner for television signals
  • Five-in-one tuner for television signals
  • Five-in-one tuner for television signals

Examples

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Embodiment Construction

[0019] Such as figure 1 As shown, a five-in-one tuner for TV signals includes a radio frequency preprocessing module A for filtering DVB-T / C and ATV signals and interstage impedance matching; a frequency down conversion module for converting DVB -T / C and ATV signals are converted into low-IF signals suitable for DVB-T / C / ATV demodulation module; DVB-T / C / ATV demodulation module is used to demodulate low-IF signals and output video and audio signals or Serial / parallel data stream; RF preprocessing module B, used for filtering and high-frequency amplification of DVB-S / S2 signals; zero-IF processing module, used for frequency conversion of DVB-S / S2 signals into I / Q signals; DVB -S / S2 demodulation module, used to demodulate I / Q signal; decoding module, used to decode data stream;

[0020] Among them, the radio frequency preprocessing module A, the down conversion processing module, the DVB-T / C / ATV demodulation module, and the decoding module are connected in sequence, and the DVB-T...

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Abstract

The invention discloses a five-in-one tuner for television signals. The five-in-one tuner comprises a radio frequency preprocessing module A, a down-conversion module, a digital video broadcasting-terrestrial/cable (DVB-T/C)/Asia television (ATV) demodulation module, a radio frequency preprocessing module B, a zero intermediate frequency processing module, a DVB-satellite/satellite-second generation (S/S2) demodulation module and a decoding module, wherein the radio frequency preprocessing module A is used for performing filtering and inter-level impedance matching on DVB-T/C and ATV signals;the down-conversion module is used for converting the DVT-T/C and ATV signals into low intermediate frequency signals; the DVT-T/C/ATV demodulation module is used for demodulating the low intermediate frequency signals, and outputting audio and video signals or a serial/parallel data stream; the radio frequency preprocessing module B is used for performing filtering and high frequency amplification on DVB-S/S2 signals; the zero intermediate frequency processing module is used for performing frequency conversion on the DVB-S/S2 signals to obtain I/Q signals; the DVB-S/S2 demodulation module isused for demodulating the I/Q signals; and the decoding module is used for decoding the data stream. The five-in-one tuner can realize the compatible demodulation and decoding output of DVB-T, DVB-C,ATV, DVB-S and DVB-S2 television signals.

Description

technical field [0001] The invention relates to an electronic tuner, in particular to a five-in-one tuner which is compatible with DVB-T, DVB-C and ATV TV signal low-intermediate frequency output, and also includes DVB-S and DVB-S2 TV signal demodulation . Background technique [0002] The emergence of digital TV programs makes the TV receiving system must have the ability to receive analog signals and multi-standard digital signals at the same time. The existing TV signals include DVB-T, DVB-C, ATV, DVB-S and DVB-S2, where DVB-T is a terrestrial digital TV signal, DVB-C is a cable digital TV signal, and ATV is an analog TV signal , DVB-S is a standard-definition digital satellite TV signal, and DVB-S2 is a high-definition digital satellite TV signal. The basic receiving function of the TV receiving system is to receive analog TV signals and digital TV signals, among which the working frequency for receiving DVB-T, DVB-C and ATV is: 45MHz-860MHz, and the working frequency ...

Claims

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Application Information

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IPC IPC(8): H04N5/50H04N5/44
Inventor 卢铬坤
Owner EARDA TECH CO LTD
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