Digital television system

A digital TV system and digital technology, applied in high-definition TV systems, components of TV systems, TVs, etc., to achieve the effect of convenience, stability and increase of digital TV users

Inactive Publication Date: 2004-08-25
肖敏 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome the defects that the existing digital TV technology needs to carry out various expensive technical transformatio

Method used

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  • Digital television system
  • Digital television system

Examples

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Example Embodiment

[0010] In the figure, digital audio and video (1) and analog audio and video (2) are converted into a unified MPEG audio and video stream by the signal converter (3), and the MPEG audio and video stream formed in the signal converter is passed through the modulator (4) And the mixer (5), and the cable television transmission network (6) reach the digital set-top box (7) of the end user. The digital set-top box (7) first passes the black and white TV receiving circuit (9) to the MPEG video stream in the TV carrier signal After separation, the separated MPEG video stream is converted to a suitable level by the MPEG decoding circuit (11) through the level conversion circuit (10), and the MPEG decoding circuit (11) converts the MPEG video stream into audio The video signal is used to broadcast TV programs on the TV (8).

[0011] The characteristic of the present invention is that the modulation mode uses the amplitude modulation mode of analog TV instead of the QAM modulation mode in ...

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Abstract

A digit TV system converts digital audio/ video frequency and audio / video frequency into a MPEG audio/ video stream to be transmitted to end users via analog wire TV transmission system, the end users receive and display digital TV signals by digital set top boxes composed of black and white TV receiving circuit and MPEG decoders.

Description

Technical field [0001] The invention relates to a system for implementing digital television on an existing analog television system. In particular, this system can realize all functions of digital TV without modifying the existing cable TV transmitting, transmitting and receiving parts. Background technique [0002] Currently known digital television systems require costly modifications to existing analog cable television transmission, transmission and reception sections. As a result, cable TV stations need to invest a lot of manpower and material resources in the existing system to realize digital TV, and end users need to purchase expensive digital set-top boxes to realize watching digital TV programs. Due to the high cost of the existing digital TV technology, the marketing work is difficult. Contents of the invention [0003] In order to overcome the defects that the existing digital TV technology needs expensive technological transformation in various aspects of th...

Claims

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Application Information

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IPC IPC(8): H04N5/44H04N7/015
Inventor 肖敏
Owner 肖敏
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