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Receiving device of analog television

A technology for a receiving device and an analog TV, which is applied to TVs, color TVs, components of color TVs, etc., and can solve problems such as suboptimal effects and affecting the quality of TV and video signals.

Active Publication Date: 2012-05-23
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the effect of analog demodulation is often not ideal, which greatly affects the quality of TV video signals

Method used

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  • Receiving device of analog television
  • Receiving device of analog television
  • Receiving device of analog television

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] figure 2 It is a block diagram of the hardware architecture of the analog TV receiving device of the present invention. The analog TV receiving device 20 includes a radio frequency tuner 21, a surface acoustic wave (SAW) filter circuit 22, and an intermediate frequency (IF) circuit 23. The radio frequency tuner 21 can convert an analog radio frequency electric video signal received by the antenna 211 into an analog intermediate frequency electric video signal. The surface acoustic wave filter circuit 22 is coupled to the radio frequency tuner 21 to filter out the noise of the analog intermediate frequency electric video signal. The intermediate frequency circuit 23 includes a conversion circuit 231 and a digital demodulator 232. The conversion circuit 231 is coupled between the surface acoustic wave filter circuit 22 and the digital demodulator 232 for converting the noise-filtered analog intermediate frequency electrical video signal into a digital electrical video sig...

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PUM

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Abstract

The invention provides a receiving device of an analog television, which can be used for converting a received analog television frequency signal into a digital television frequency signal and carrying out digital demodulation, so as to improve the demodulation efficiency. The receiving device of the analog television comprises a radio-frequency tuner and an intermediate-frequency circuit. The radio-frequency tuner can be used for converting a received analog radio-frequency television frequency signal into an analog intermediate-frequency television frequency signal. The intermediate-frequency circuit comprises a conversion circuit and a digital demodulator. The conversion circuit can be used for converting the analog intermediate-frequency television frequency signal into a digital television frequency signal; and the digital demodulator is used for demodulating the digital television frequency signal, so as to generate a digital demodulation video signal and a digital demodulation audio signal.

Description

Technical field [0001] The present invention relates to an analog television, in particular to an analog television receiving device. Background technique [0002] In analog TV technology, the receiver is a very critical part. In the prior art, the analog TV receiver uses an analog method to demodulate the signal, and its hardware architecture is as figure 1 As shown, the analog television receiver 10 includes a radio frequency tuner (RF tuner) 11, a surface acoustic wave (SAW) filter circuit 12, a programmable gain amplifier (PGA) 13, an analog demodulator (analog demodulator) 14 and analog-to-digital converter (ADC) 15 and 16. The radio frequency tuner 11 can convert the analog radio frequency electrical video signal received by the antenna 111 into an analog intermediate frequency electrical video signal; the surface acoustic wave filter circuit 12 can filter out the noise of the analog intermediate frequency electrical video signal; the programmable gain amplifier 13 can fil...

Claims

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Application Information

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IPC IPC(8): H04N5/44
Inventor 王富正
Owner MEDIATEK INC