Digital television broadcasting system based on MPEG-1

A digital TV broadcasting, MPEG-1 technology, applied in high-definition TV systems, TV system components, TVs, etc., can solve problems such as low compression efficiency and inability to use MPEG-1 program sources, and achieve low-cost Effect

Active Publication Date: 2005-03-16
南通研祥智能科技有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0012] However, the above-mentioned cable digital TV broadcasting system based on MPEG-2 technology adopts MPEG-2 source coding technology, so the compression efficiency is lower than that of MPEG1 technology; in addition, after 1995, IP technology has been w...

Method used

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  • Digital television broadcasting system based on MPEG-1
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  • Digital television broadcasting system based on MPEG-1

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Embodiment Construction

[0024] see figure 2 , is an MPEG-1-based cable digital TV broadcasting system that integrates IP technology in the present invention. The broadcasting system includes an MPEG-1 encoder 9 , a DES scrambler 10 , an IP data stream multiplexer 12 and a QAM modulator 13 sequentially connected to the output. These devices are integrated in the chassis.

[0025] There are about 30 sets of PAL programs in the signal source part, which are processed by MPEG-1 encoder 9 for video compression and encoding, and become MPEG-1 video streams in IP mode; then the MPEG-1 video streams in IP mode are sent to the DES scrambler 10 Control the DES encryption through the management system 11; then transmit the encrypted IP MPEG-1 video stream to the IP data stream multiplexer 12, convert the IP MPEG-1 video stream into a TS data stream and send it to QAM Modulator 13 ; the digital signal is then modulated into a radio frequency signal by the QAM modulator 13 for transmission in the HFC network 1...

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Abstract

The invention is a digital television broadcasting system based on MPEG-1, the system is made up of network, digital television broadcasting system based on MPEG-1 through the network and digital television broadcasting receiving system based on MPEG-1. The transmitting system includes MPEG-1 coder, disturber, IP data flow complex device and modulator, the receiving system includes resonance device, demodulator, TS data flow demultiplexing device, and MPEG-1 decoder. The cost is low, and it can display program source with MPEG-1 format with IP mode.

Description

【Technical field】 [0001] The invention relates to a digital television broadcasting system, in particular to a digital television broadcasting system based on MPEG-1 technology. 【Background technique】 [0002] Established in 1992, MPEG-1 is designed as an industrial standard, which can be applied to devices with different bandwidths, such as CD-ROM, Video-CD, CD-R, etc. It is mainly aimed at the international standard for digital storage media moving images and their accompanying audio encoding with a data transmission rate below 1.5Mbps. It is used to store synchronous and color motion video signals on CD-ROM, which can be optimized for medium resolution and optimized in its In this mode, images in the SIF standard exchange format (352×240 for NTSC, 352×288 for PAL) are used to compress images, the transmission rate is 1.5Mbps, and it can play 30 frames per second. It has CD (refers to laser disc) The sound quality is basically equivalent to VHS. [0003] The encoding rat...

Claims

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Application Information

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IPC IPC(8): H04L9/06H04N5/44H04N7/015H04N7/20
Inventor 左愚
Owner 南通研祥智能科技有限公司
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