公开(公告)号：KR1020020075592A

公开(公告)日：2002-10-05

申请号：KR1020010015675

申请日：2001-03-26

Applicant: 한국전자통신연구원

Inventor： 윤병식 ,  강상원 ,  지상현 ,  김형중 ,  최송인 ,  김대식

IPC: G10L19/038 ,  G10L19/04

CPC classification number: G10L19/07

Abstract: PURPOSE: An LSF(Line Spectral Frequency) quantizer for a wide band voice encoder is provided to reduce the computation amount and the memory capacity required for searching code book without any decrease of the SD performance by introducing safety-net and the split vector quantizer into the LSF coefficient quantizer. CONSTITUTION: An LSF quantizer for a wide band voice encoder includes a subtracter(11) for removing DC components by receiving LSF coefficient vectors(R(n)), a memory-based PVQ(pyramid vector quantization) unit(12) and a memoryless PVQ unit(13) for quantizing received LSF coefficient vectors from which the DC components are removed, a switching element(14) for selecting and outputting quantizing vectors having a small Euclidean distance from the input LSF coefficient vectors among the quantizing vectors quantized in the memory-based PVQ unit and the memoryless PVQ unit, and an adder(15) for adding the selected quantizing vector to the DC components of the LSF coefficient vectors.

Abstract translation: 目的：提供宽带语音编码器的LSF（线谱频率）量化器，通过引入安全网和分割矢量量化器来减少搜索码本所需的计算量和存储容量，而不会降低SD性能 LSF系数量化器。 构成：用于宽带语音编码器的LSF量化器包括用于通过接收LSF系数向量（R（n）），基于存储器的PVQ（金字塔矢量量化）单元（12）和无记忆体（12）来去除DC分量的减法器（11） 用于量化从其中除去DC分量的接收的LSF系数向量的PVQ单元（13），用于从在存储器中量化的量化矢量中的输入LSF系数向量中选择和输出具有小欧几里得距离的量化矢量的开关元件（14） 基于PVQ单元和无记忆PVQ单元;以及加法器（15），用于将所选择的量化矢量与LSF系数向量的DC分量相加。