Jonathan H Ta

US Patent:

6711245, Mar 23, 2004

Filed:

Mar 15, 2002

Appl. No.:

10/099582

Inventors:

Olivier Mardinian - Sunnyvale CA
Jonathan How-Lian Ta - Irvine CA
Jeffrey Wei Huang - Rowland Heights CA

Assignee:

Apple Computer, Inc. - Cupertino CA

International Classification:

H04M 1100

US Classification:

379 9328, 37911001, 379372

Abstract:

The present invention includes a method and system to provide the capability of a serial based analog modem to play its connection call progress in a digital format, thus eliminating the need for analog to digital conversion at the host. In one aspect of the invention, an exemplary method includes receiving data at the serial communication device, from a serial communication network; identifying the data as call progress audio samples; transmitting the call progress audio samples to the host through the serial interface, the serial interface carrying serial data or call progress audio samples; and playing the call progress audio samples at the audio system of the host. Other methods and apparatuses are also described.

US Patent:

62721844, Aug 7, 2001

Filed:

Dec 17, 1997

Appl. No.:

8/992034

Inventors:

Jonathan H. Ta - Irvine CA
Samuel T. Wong - Rowland Heights CA
Stanley C. Hsieh - Diamond Bar CA
Sandeep Rajpal - Irvine CA

Assignee:

Conexant Systems, Inc. - Newport Beach CA

International Classification:

H03D 300
H04L 2714

US Classification:

375334

Abstract:

A non-coherent frequency shift keying detection scheme. The invention has been applied to the special case of capturing caller ID information when the voice-band modem is in the low power mode. The technique provides the capability for capturing and decoding enough of the caller ID information transmitted by the telephone company while the computer is in the sleep or low power mode, and upon awakening the computer can use this captured information to decode the actual caller ID information. Additionally, this invention automatically accommodates both the Bell 202 or V. 23 transmission standards by utilizing a threshold concept in which the time that has elapsed between the zero crossings of an FSK tone half cycle are measured. The elapsed times may be used as an indication of which FSK tone has been transmitted thus allowing capture of caller ID information. The bit output of the caller ID capture circuit is output for storage by RAM thus allowing use by the computer when it wakes up.