公开(公告)号：KR100461900B1

公开(公告)日：2004-12-17

申请号：KR1020020072668

申请日：2002-11-21

Applicant: 한국전자통신연구원

Inventor： 양해용 ,  이경훈 ,  황인호

IPC: H04L12/66

Abstract: PURPOSE: A low-delay formant FEC(Forward Error Correction) method is provided to use formant components of a future frame as surplus information used for restoring voice packet loss, thereby reducing delay and improving sound quality. CONSTITUTION: An input voice frame is compressed after a frame delay and a look-ahead delay, and a voice packet is generated after a compressive processing delay(310). A formant preparing for loss of the input voice frame is extracted(312). Packets are transmitted after the compressive delay(314). When the packets are transmitted from a transmission terminal, the packets arrive at a receiving terminal after a transmission delay(316). A certain packet is lost among the receiving packets inputted to a CODEC of the receiving terminal(318). When the packet is lost, the lost packet is restored by using surplus information(320).

Abstract translation: 目的：提供低延迟共振峰FEC（前向纠错）方法，以使用未来帧的共振峰成分作为用于恢复语音包丢失的剩余信息，由此减少延迟并改善音质。 组成：输入话音帧在帧延迟和预见延迟之后被压缩，并且在压缩处理延迟（310）之后产生话音分组。 准备丢失输入语音帧的共振峰被提取（312）。 分组在经过压缩延迟（314）后传输。 当分组从传输终端传输时，分组在传输延迟之后到达接收终端（316）。 在输入到接收终端（318）的CODEC的接收分组中丢失某个分组。 当分组丢失时，通过使用剩余信息来恢复丢失的分组（320）。