Patent Number: 7,765,100

Title: Method and apparatus for recovering line spectrum pair parameter and speech decoding apparatus using same

Abstract: A method and an apparatus for recovering a line spectrum pair (LSP) parameter of a spectrum region when frame loss occurs during speech decoding and a speech decoding apparatus adopting the same are provided. The method of recovering an LSP parameter in speech decoding includes: if it is determined that a received speech packet has an erased frame, converting an LSP parameter of a previous good frame (PGF) of the erased frame or LSP parameters of the PGF and a next good frame (NGF) of the erased frame into a spectrum region and obtaining a spectrum envelope of the PGF or spectrum envelopes of the PGF and NGF; recovering a spectrum envelope of the erased frame using the spectrum envelope of the PGF or the spectrum envelopes of the PGF and NGF; and converting the recovered spectrum envelope of the erased frame into an LSP parameter of the erased frame. The method and apparatus can improve the quality of a recovered speech signal, be applied to a variety of technologies, and provide a method of recovering an LSP parameter for development of an algorithm for speech decoding.

Inventors: Sung; Hosang (Youngin-si, KR), Choi; Seungho (Seoul, KR), Choo; Kihyun (Seoul, KR)

Assignee: Samsung Electronics Co., Ltd.

International Classification: G10L 11/00 (20060101); G10L 19/14 (20060101); G10L 13/00 (20060101); G10L 19/00 (20060101); G10L 13/06 (20060101)

Expiration Date: 7/27/12018