KR970019670A

KR970019670A - Video signal transmitter

Info

Publication number: KR970019670A
Application number: KR1019950032855A
Authority: KR
Inventors: 윤성욱
Original assignee: 배순훈; 대우전자 주식회사
Priority date: 1995-09-29
Filing date: 1995-09-29
Publication date: 1997-04-30

Abstract

본 발명은 하드웨어적인 구현을 용이하게 할 수 있는 영상 신호 전송 장치에 관한 것으로서, 종래 계층 부호화는 움직임 추정부를 함께 사용해서 2차원 이산 코사인 변환을 통한 계층 부호화가 이루어져 왔으나, 움직임 추정부의 도입은 하드웨어적으로 구현이 어려운 결점이 있었으나, 본 발명에서는 움직임 추정부를 제거하여 동화상 부호화를 위한 하드웨어적인 구현이 용이해 지도록 하므로 상기 결점을 개선시킬 수 있는 것이다.The present invention relates to a video signal transmission apparatus that can facilitate hardware implementation. In the conventional hierarchical coding, hierarchical coding has been performed through two-dimensional discrete cosine transform using a motion estimation unit together, but the introduction of the motion estimation unit is hardware. However, the present invention has a disadvantage in that it is difficult to implement. In the present invention, the hardware can be easily implemented for moving picture coding by removing the motion estimation unit.

Description

Video signal transmitter

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

제1도는 본 발명에 따른 영상 신호 전송 장치의 일 실시예를 나타낸 블럭도1 is a block diagram showing an embodiment of an image signal transmission apparatus according to the present invention.

제2도는 본 발명에 따른 영상 신호 전송 장치의 다른 실시예를 나타낸 블럭도2 is a block diagram showing another embodiment of a video signal transmission apparatus according to the present invention.

Claims

A frame memory 10 which receives an input video signal and stores and outputs a signal of a frame; A discrete cosine converter 12 for receiving a frame signal from the frame memory 10 and outputting the discrete cosine transform; A first quantizer 14 for receiving a discrete cosine transformed signal from the discrete cosine transform unit 12 and outputting the quantized signal for transmission; And a second quantization unit (16) for receiving the quantized signal from the first quantization unit (14) and outputting the quantized signal for transmission.

The apparatus of claim 1, wherein the frame memory (10) stores and outputs signals of four frames.

The apparatus of claim 1, wherein the discrete cosine transform unit 12 outputs a three-dimensional discrete cosine transform.

The apparatus of claim 1, wherein the quantization step size of the first quantization unit 14 is larger than the quantization step size of the second quantization unit 16.

An adder 20 for adding and outputting an input video signal and a motion compensated signal; A discrete cosine transform unit 22 for outputting the discrete cosine transformed output of the adder 20; A first quantizer (24) for outputting the quantized output of the discrete cosine transformer (22) for transmission; A second quantization unit 26 for outputting the output of the fraudulent first quantization unit 24 for quantization and transmission again; A first inverse quantizer (28) for inversely quantizing and outputting the output of the first quantizer (24); A second inverse quantization unit 30 for inversely quantizing and outputting the output of the second quantization unit 26; An inverse discrete cosine transforming unit (32) for inverse discrete cosine transforming the output of the first inverse quantization unit (28) and the output of the second inverse quantization unit (30); An adder (34) for adding and outputting the output of the inverse discrete cosine transform unit (32) and the motion compensated signal; And a motion compensator (36) for compensating for the motion without receiving the output of the adder (34) and applying a motion compensation signal to the adders (20, 34).

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