KR970057832A

KR970057832A - Coder Using Partial Search Quantization

Info

Publication number: KR970057832A
Application number: KR1019950052105A
Authority: KR
Inventors: 윤성욱
Original assignee: 배순훈; 대우전자 주식회사
Priority date: 1995-12-19
Filing date: 1995-12-19
Publication date: 1997-07-31

Abstract

본 발명은 감산기(10), 국부 복호기(40), 움직임 예측 블럭(50)을 포함하며, 상기 감산기(10)의 영상신호를 양자화 및 부호화하여 송신하는 부호화기에 관한 것으로서, 상기 감산기(10)의 차분 신호를 주파수 대역별로 분할하는 주파수 분할부(20)와; 상기 주파수 분할부(20)로부터의 대역별 차분 신호를 프루닝 데이타에 따라 양자화하는 다수의 부분 탐색 양자화기(31,32, 33)들을 포함하며, 상기 부분 탐색 양자화기(31,32,33)들은 양자화 데이타 수에 대응하는 프루닝 데이타를 입력된 차분 신호의 주파수보다 높은 주파수 대역의 차분 신호를 양자화하는 부분 탐색 양자화기(32,33)에 인가하도록 구성한 양자화 회로(30)를 구비하고, 상기 국부 복호기(40)는 상기 양자화 회로(30)의 부분 탐색 양자화기(31,32,33)의 양자화 데이타들을 역양자화하여 출력하는 역양자화부(42)와, 주파수 대역별로 분할된 상기 역양자화부(42)의 데이타들을 혼합하는 혼합부(44)와, 상기 혼합부(44)의 출력 및 움직임 예측 블럭의 예측 신호를 가산하는 가산기(46)를 포함하게 구성된다.The present invention relates to an encoder including a subtractor (10), a local decoder (40), and a motion prediction block (50), which quantizes, encodes, and transmits an image signal of the subtractor (10). A frequency dividing unit 20 for dividing the difference signal for each frequency band; And a plurality of partial search quantizers 31, 32, and 33 for quantizing band-specific differential signals from the frequency divider 20 according to pruning data. And a quantization circuit 30 configured to apply the pruning data corresponding to the number of quantization data to the partial search quantizers 32 and 33 for quantizing the differential signal in the frequency band higher than the frequency of the input differential signal. The local decoder 40 inversely quantizes and outputs the quantized data of the partial search quantizers 31, 32, and 33 of the quantization circuit 30, and the inverse quantizer divided by frequency band. A mixing section 44 for mixing the data of (42), and an adder 46 for adding the output signal of the mixing section 44 and the prediction signal of the motion prediction block.

따라서, 본 발명은 영상 신호들을 주파수 대역별로 부분 벡터 양자화하므로써 주파수 대역별 양자값들의 중복성을 감축할 수 있다는 효과가 있다.Accordingly, the present invention has an effect of reducing redundancy of quantum values for each frequency band by partial vector quantization of image signals for each frequency band.

Description

Coder Using Partial Search Quantization

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

도면은 본 발명에 따른 부분 탐색 양자화를 이용한 부호화기의 블럭도.Is a block diagram of an encoder using partial search quantization according to the present invention.

Claims

An encoder including a subtractor 10, a local decoder 40, and a motion prediction block 50, which quantizes, encodes, and transmits an image signal of the adder 10, wherein the difference signal of the subtractor 10 is a frequency. A frequency division unit 20 for dividing the bands; And a plurality of partial search quantizers 31, 32, and 33 for quantizing band-specific differential signals from the frequency divider 20 according to pruning data. And a quantization circuit 30 configured to apply the pruning data corresponding to the number of quantization data to the partial search quantizers 32 and 33 for quantizing the differential signal in the frequency band higher than the frequency of the input differential signal. The local decoder 40 is a quantization day of the partial search quantizers 31, 32, 33 of the quantization circuit 30.

An inverse quantization unit 42 for inversely quantizing the outputs, a mixing unit 44 for mixing data of the inverse quantization unit 42 divided by frequency bands, and output and motion prediction of the mixing unit 44 An encoder using partial search quantization, comprising an adder (46) for adding a prediction signal of a block.

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