C & S Technology Co., Ltd.

Goldstar, Co., Ltd.

Seong Hoon Hong

Min Kyu Shim

Yoo Na Sung

Sang Won Kang

Myung Jin Bae

Jeong Jin Kim

Chang Yong Son

Won Il Lee

Kyung A Jang

A high-speed search method in a speech encoder using an order character of LSP (Line Spectrum Pair) parameters in an LSP parameter quantizer using SVQ (Split Vector Quantization) used in a low-speed transmission speech encoder, includes the steps of rearranging a codebook according to an element value of a reference row for determining a range of code vectors to be searched; and determining a search range by using an order character between a given target vector and an arranged code vector to obtain an optimal code vector. The method gives effects of reducing computational complexity required to search the codebook without signal distortion in quantizing the LSP parameters of the speech encoder using SVQ, and reducing computational complexity without loss of tone quality in G.729 fixed codebook search by performing candidate selection and search on the basis of the correlation value size of the pulse position index.

High-speed search method for LSP quantizer using split VQ and fixed codebook of G.729 speech encoder

A method of searching an MP-MLQ fixed codebook through bit predetermination includes the steps of generating a target vector with amplitude, reducing time to search an optimal pulse array through the bit predetermination and searching all of pulses if two errors have an identical value.

Method for improvement of G.723.1 processing time and speech quality and for reduction of bit rate in CELP vocoder and CELP vococer using the same

A luminance and color signal isolation device having a horizontal nonlinear luminance signal dector which is detecting a luminance signal from a synthesis picture signal as an input without having any change to the horizontal direction; and a vertical nonlinear luminance signal dector which is detecting the luminance signal with the synthesis picture signal as an input without having any change to the vertical direction. A color signal detector detects a color signal from the synthesis picture signal; and a delay device which delays the synthesis picture signal for a certain time in order to be in synchronism with the output signal of the color signal detector. A subtractor subtracts an output signal of the color signal detector from the output signal of the delay device; and a control signal generator detects any change of the synthesis picture signal to the vertical or horizontal direction and also generates control signals of CS11 and CS12. A multiplexer alternatively selects one of the luminance signal among the output signals from the subtractor, the detector of vertical nonlinear luminance signal, and the detector of horizontal nonlinear luminance signal using the control signals of CS11 and CS 12 as the input signals from the control signal generator.

Luminance and color signal isolation device

Growing community of inventors

Seoul, South Korea

Seong Hoon Hong