Jianxin L Liu

US Patent:

6724416, Apr 20, 2004

Filed:

Oct 1, 2002

Appl. No.:

10/263099

Inventors:

Jianxin Liu - Fremont CA 94536

International Classification:

H04N 714

US Classification:

348 1402, 348 1413, 348 1401

Abstract:

An Image Transceiving Telephone with Integrated Digital Camera (ITTDC) for simultaneous transceiving of real-time audio and non-real time image through a Public Switched Telephone Network (PSTN) is disclosed. The ITTDC includes an integrated telephone front end, a PSTN access device, an audio CODEC, an image input device, an image CODEC, an image display device, a local storage for an embedded system control software and associated control and operating parameters and data, an optional local electronic interface, a user-control and a system control including the embedded system control software. The control software further includes an audio sampling and processing means, an image capturing and processing means and a process priority control means allocating, via a real-time audio but non-real time image transfer protocol control, a highest priority to tasks for audio information processing whereas a lower priority to tasks for image information processing.

US Patent:

6999826, Feb 14, 2006

Filed:

Nov 18, 1998

Appl. No.:

09/195129

Inventors:

Jian Zhou - San Jose CA, US
Jianxin Liu - Mountain View CA, US
Zhengran Li - Campbell CA, US

Assignee:

Zoran Corporation - Sunnyvale CA

International Classification:

G06F 17/00
H03F 5/00

US Classification:

700 94, 381103

Abstract:

A computer readable memory to direct a computer to improve the perceived audio quality of a speaker included in that computer. The computer readable memory stores a first, second and third set of instructions. The first set of instructions causes the computer to determine the speaker type. The second set of instructions causes the computer to select a set of default filter coefficients for a digital filter based upon the speaker type. Finally, the third set of instructions causes the computer to realize a digital parametric equalizer using a digital filter and the set of default filter coefficients. Thus, the digital filter alters the audio signal that is input to the speaker, thereby improving the perceived quality of the speaker.

US Patent:

61637890, Dec 19, 2000

Filed:

Nov 18, 1998

Appl. No.:

9/195295

Inventors:

Jianxin Liu - Mountain View CA

Assignee:

Oak Technology, Inc. - Sunnyvale CA

International Classification:

G06F 1710

US Classification:

708323

Abstract:

An improved digital parametric equalizer realized by software stored in a computer readable memory. The computer readable memory stores a first and a second set of instructions. The first set of instructions determines a value of a tuning coefficient based upon whether a parametric equalizer is to cut or to boost an input signal. The second set of instructions implements a filter to realize the parametric equalizer. The second set of instructions uses the value of the tuning coefficient and the input signal to produce an output signal having substantially symmetrical cut and boost spectrums.