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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

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the defects that the existing digital TV technology needs to carry out various expensive technical transformations on the existing cable TV system and the user purchases expensive special set-top boxes, the present invention provides a digital TV system

Method used

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Examples

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Embodiment Construction

[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 through a signal converter (3), and the MPEG audio and video stream formed in the signal converter passes through a modulator (4) And the mixer (5), and the digital set-top box (7) that the cable TV transmission network (6) reaches the end user, the digital set-top box (7) first passes the MPEG video flow in the TV carrier signal through the black and white TV receiving circuit (9) Separation, the separated MPEG video stream is converted to the suitable level of the MPEG decoding circuit (11) by the level conversion circuit (10) of the MPEG video stream, and the MPEG decoding circuit (11) converts the MPEG video stream into audio The video signal broadcasts television programs on the television set (8).

[0011] The present invention is characterized in that the modulation mode uses the amplitude modulation modulation mode of analog TV, rath...

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PUM

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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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