Samsung Electronics Co., Ltd.

Geun-Bae Song

Jae-Bum Kim

Min-Sung Kim

Austin Kim

Pavel Martynovich

Ho-chong Park

Hee-jin Oh

Chul-Yong Ahn

A voice packet forwarding apparatus and method is provided in a digital communication system including a switched vocoder module to directly pass a voice packet received from a packet terminal to a digital communication network or a PCM signal decoded from the voice packet to the digital communication network. The switched vocoder module is also provided to directly pass a voice packet received from the digital communication network to the packet terminal or transmit a voice packet coded from a PCM signal received from the digital communication network. In the presence of additional data to be transmitted to the packet terminal, a data inserter is provided to insert the additional data in the voice packet received from the switched vocoder module and transmit the voice packet with the additional data to the packet terminal. A controller is provided to control the switched vocoder module and the data inserter.

Apparatus and method for forwarding voice packet in a digital communication system

An apparatus and method for encoding and decoding using mutual information between a high band signal and a low band signal to increase a coding efficiency in a portable terminal are provided. The apparatus includes a bandwidth extender for extracting auxiliary information relating to a characteristic of a high band signal using the high band signal and a low band signal and an encoder for encoding residual high band signal obtained by subtracting auxiliary information acquired from the low band signal from auxiliary information acquired from the high band signal.

Apparatus and method for encoding and decoding using bandwidth extension in portable terminal

A method and apparatus for expanding a bandwidth of an input narrowband voice signal is provided. The narrowband voice signal is analyzed separately for each frame, and a Degree of Voicing (DV) and a Degree of Stationary (DS) are calculated depending on the analysis. A Degree of Difficulty of Bandwidth Expansion (DDBWE) of the narrowband voice signal is calculated based on DV and DS. Bandwidth expansion is controlled according to DDBWE.

Method and apparatus for expanding bandwidth of voice signal

Growing community of inventors

Jecheon-si, South Korea

Geun-Bae Song