公开(公告)号：US20040101052A1

公开(公告)日：2004-05-27

申请号：US10659386

申请日：2003-09-11

Applicant: LG ELECTRONCIS INC.

Inventor： Kyu-Chan Roh

IPC: H04N007/12

CPC classification number: H04N19/66 ,  H04N19/124 ,  H04N19/18 ,  H04N19/34 ,  H04N19/48 ,  H04N19/61 ,  H04N19/89

Abstract: A fine granularity scalability encoding/decoding apparatus includes a first quantizer for performing a DCT on a motion-compensated image and quantizing a resulting value, a second quantizer for re-quantizing the value obtained by the first quantizer, an inverse-quantizer for re-quantizing a value re-quantized by the second quantizer, and a number of subtracters. A first subtracter obtains a difference between a value of N times the re-quantized value and the inverse-quantized value. A second subtracter obtains a difference between the value quantized by the first quantizer and the value quantized by the inverse-quantizer. And, a third subtracter subtracts the output value of the first subtracter from the output value of the second subtracter. Coding efficiency is increased and a bit-rate reduction of an entire coding stream is achieved by making an enhancement layer signal and a base layer signal have the same code.

Abstract translation: 细粒度可伸缩性编码/解码装置包括：第一量化器，用于对运动补偿图像执行DCT并量化得到的值;第二量化器，用于对由第一量化器获得的值重新量化;反量化器， 量化由第二量化器重新量化的值和多个减法器。 第一减法器获得重新量化值的N倍的值与逆量化值之间的差。 第二减法器获得由第一量化器量化的值与由逆量化器量化的值之间的差。 而且，第三减法器从第二减法器的输出值中减去第一减法器的输出值。 提高编码效率，通过使增强层信号和基层信号具有相同的代码来实现整个编码流的比特率降低。