KR970056904A

KR970056904A - European high definition tv

Info

Publication number: KR970056904A
Application number: KR1019950069143A
Authority: KR
Inventors: 최영배
Original assignee: 배순훈; 대우전자 주식회사
Priority date: 1995-12-30
Filing date: 1995-12-30
Publication date: 1997-07-31

Abstract

본 발명은 유럽형 고화질 텔레비젼에 관한 것으로서, 본 발명의 장치는 필터부(40)와; 주파수 하향부(42); 자동 이득 제어부(44); A/D 변환부(46); OFDM 복조부(48); 동화부(50); QAM 매핑부(52); 길쌈 디인터리버(54); 트렐리스 디코더(56); 패킷 동기 바이트 검출부(57); 블럭 디인터리버(58); 리드-솔로몬 디코더(60); 디스크램블러(62); 출력 인터페이스(56); MPEG 디코더(66); 이전 프레임 저장부(67); 및 모니터 출력 처리부(68)로 구성되어 있으며, 본 발명에 따르면 수신된 데이타 패킷의 동기 바이트를 검출하여 동기가 잘 이루어지고 있는 가를 확인한 후, 동기 바이트에 에러가 발생한 경우에는 이전 프레임의 영상을 다시 보여줌으로써, 시청자에서 시각적으로 불편함이 없는 정상적인 화면을 제공해 줄 수 있다는데 그 이점이 있다.The present invention relates to a European high definition television, the apparatus of the present invention comprising: a filter unit (40); Frequency down section 42; Automatic gain control section 44; An A / D converter 46; An OFDM demodulator 48; A moving part 50; QAM mapping unit 52; Weaving deinterleaver 54; Trellis decoder 56; A packet sync byte detector 57; Block deinterleaver 58; Reed-Solomon decoder 60; Descrambler 62; Output interface 56; MPEG decoder 66; Previous frame storage 67; And a monitor output processing unit 68. According to the present invention, after detecting the synchronization byte of the received data packet to confirm whether the synchronization is well performed, and if an error occurs in the synchronization byte, the image of the previous frame is reconstructed. By showing, there is an advantage that the viewer can provide a normal screen without visual inconvenience.

Description

European high definition tv

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 본 발명에 따른 유럽형 고화질 텔레비젼의 구성 블럭도이다.2 is a block diagram of a configuration of a European high definition television according to the present invention.

Claims

A filter unit 40 for receiving an encoded OFDM intermediate frequency signal and outputting a band pass signal; A frequency down part 42 which receives the band pass signal and downgrades the frequency to a base band signal; An automatic gain control section 44 which automatically controls the gain so that the output level remains unchanged even if there is a change in the input level; An A / D converter 46 for converting an analog signal into a digital signal; An OFDM demodulator 48 which performs OFDM demodulation again on the OFDM modulated signal; An equalizer 50 for compensating for distortion caused by non-ideal characteristics of the transmission channel; A QAM mapping unit 52 for remapping a symbol to a predetermined bart; A convolutional deinterleaver 54 for restoring interleaved data to original data to make the clustering error a random error; A trellis decoder 56 for performing trellis decoding; A packet sync byte detector 57 for detecting a sync byte of the data packet and outputting a control signal in accordance with the detected sync byte state; A block deinterleaver 58 for restoring interleaved data to original data to make the cluster error a random error; A Reed-Solomon decoder 60 for performing Reed-Solomon decoding; A descrambler 62 for restoring the randomized signal to the original data signal; An output interface 64 for facilitating data transmission; An MPEG decoder 66 for decoding the MPEG encoded data again; A previous frame storage unit 67 storing data of a previous frame; When an error occurs in the sync byte, the monitor output processor 68 receives and processes the previous frame data stored in the previous frame storage unit 67 according to a control signal from the packet sync byte detection unit 57 and outputs it to the monitor. Consist of European high definition television.

※ Note: The disclosure is based on the initial application.