Tao Tian

US Patent:

7466248, Dec 16, 2008

Filed:

Apr 19, 2007

Appl. No.:

11/737699

Inventors:

Vijayalakshmi R. Raveendran - San Diego CA, US
Peisong Chen - San Diego CA, US
Tao Tian - San Diego CA, US

International Classification:

H03M 7/40

US Classification:

341 67, 341 65

Abstract:

Embodiments include systems and methods of improving processing in a decoder in a multimedia transmission system. Multimedia data may include one or more of motion video, audio, still images, or any other suitable type of audio-visual data. One embodiment includes a system and method of parsing fixed and variable length codes from a bit-wise stream of multi-media data by maintaining and reading the data in a processor aligned (e. g. , word aligned) way. Another embodiment includes a system and method of decoding variable length codes, particular as received from such a variable length code using multiple levels of decoding tables to speed up decoder table lookup.

US Patent:

7746963, Jun 29, 2010

Filed:

Nov 8, 2006

Appl. No.:

11/557921

Inventors:

Seong Taek Chung - Redwood City CA, US
Krishna Kiran Mukkavilli - San Diego CA, US
Vinay Murthy - San Diego CA, US
Tao Tian - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04L 27/00

US Classification:

375344, 375260, 375326

Abstract:

Methods and apparatus for frequency tracking of a received signal. In an aspect, a method is provided wherein the received signal comprises one or more symbols having a periodic structure. The method comprises receiving a plurality of samples of a selected symbol that comprises pilot signals scrambled with data and determining a window size and a periodicity factor. The method also comprises accumulating a correlation between samples in a first window and samples in a second window to produce an accumulated correlation value, wherein the first and second windows have a size and a separation based on the window size and the periodicity factor, respectively, and deriving a frequency error estimate based on the accumulated correlation value.

US Patent:

7844018, Nov 30, 2010

Filed:

Feb 13, 2007

Appl. No.:

11/674632

Inventors:

Tao Tian - San Diego CA, US
Raghuraman Krishnamoorthi - San Diego CA, US
Krishna Kiran Mukkavilli - San Diego CA, US
Fuyun Ling - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04L 25/08

US Classification:

375346, 375316, 329318, 329320, 329349, 455 631, 4552781, 455296

Abstract:

An OFDM telecommunications system includes a transmitter and a receiver. The receiver includes a canceller configured to reduce inter-carrier interference (ICI) in an OFDM symbol in the frequency domain.

US Patent:

7974341, Jul 5, 2011

Filed:

May 2, 2006

Appl. No.:

11/416858

Inventors:

Peisong Chen - San Diego CA, US
Tao Tian - San Diego CA, US
Vijayalakshmi R. Raveendran - San Diego CA, US

Assignee:

QUALCOMM, Incorporated - San Diego CA

International Classification:

H04N 7/18

US Classification:

3752401, 37524026

Abstract:

Methods and apparatus for efficient encoding multimedia data, such as live video streams are disclosed. The multimedia data is pre-encoded into multiple layers and characteristics of the pre-encoded data are determined. Based at least in part on the determined characteristics, the multimedia data is encoded into multiple layers.

US Patent:

8102756, Jan 24, 2012

Filed:

Aug 6, 2007

Appl. No.:

11/834669

Inventors:

Krishna Kiran Mukkavilli - San Diego CA, US
Ashok Mantravadi - San Diego CA, US
Raghuraman Krishnamoorthi - San Diego CA, US
Murali Ramaswamy Chari - San Diego CA, US
Tao Tian - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04J 11/00
H04Q 7/00

US Classification:

370210, 370330

Abstract:

A method of acquiring a forward link only (FLO) network in a radio frequency (RF) in a wireless communication environment, includes selecting a RF from a first list; selecting a signal parameter (SP) from a second list; determining if a first parameter is found using the selected RF and SP; and, upon determination that the first parameter is found, enabling the use of the selected RF and SP to communicate in the FLO network. An apparatus for implementing the method is also disclosed.

US Patent:

8229983, Jul 24, 2012

Filed:

Sep 25, 2006

Appl. No.:

11/527306

Inventors:

Gordon Kent Walker - Poway CA, US
Vijayalakshmi R. Raveendran - San Diego CA, US
Peisong Chen - San Diego CA, US
Tao Tian - San Diego CA, US
Fang Shi - San Diego CA, US
Scott T. Swazey - San Diego CA, US
Seyfullah Halit Oguz - San Diego CA, US
Amit Rohatgi - San Diego CA, US
Sitaraman Ganapathy Subramania - San Diego CA, US
Phanikumar Bhamidipati - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

G06F 17/30
G06F 17/00

US Classification:

707899, 37524024, 348 1401

Abstract:

Methods and apparatus to process multimedia data enabling faster channel acquisitions, improved error recovery and improved efficiency. An encoder device encodes a first portion of multimedia data using inter-coding to generate a first version, and encodes the first portion of multimedia data using intra-coding to generate a second version. A decoder device receives a first version of a first portion of multimedia data, wherein the first version is inter-coded, receives a second version of the first portion of multimedia data, wherein the second version is intra-coded, and selectively decodes the first and second received versions.

US Patent:

8239766, Aug 7, 2012

Filed:

Aug 9, 2006

Appl. No.:

11/501969

Inventors:

Tao Tian - San Diego CA, US
Fang Shi - San Diego CA, US
Vijayalakshmi R. Raveendran - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

G06F 3/00

US Classification:

715726, 715723, 382232, 382238

Abstract:

This disclosure is directed to techniques for encoding and decoding transitional effects, i. e. , visual video effects that are used to transition from a current scene of a multimedia sequence. According to the disclosed techniques, an encoding device detects a transitional effect associated with a multimedia sequence during the encoding of the multimedia sequence, and transmits information as part of an encoded multimedia sequence to identify the transitional effect associated with the encoded multimedia sequence to a decoder. The information may comprise metadata that can be used by the decoder to simulate or re-create the transitional effect. The decoder simulates a transitional effect in response to the information.

US Patent:

8249203, Aug 21, 2012

Filed:

Sep 22, 2008

Appl. No.:

12/235553

Inventors:

Thomas Sun - San Diego CA, US
Raghuraman Krishnamoorthi - San Diego CA, US
Fuyun Ling - San Diego CA, US
Krishna Kiran Mukkavilli - San Diego CA, US
Tao Tian - San Diego CA, US
Bojan Vrcelj - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04B 1/10

US Classification:

375346, 375229, 375232, 375260, 375340, 375343, 375349, 375350, 455 631, 455 6713, 4551142, 455296, 455501, 370310, 370335, 370342, 370480, 329349, 329353, 341173, 341180, 327551, 708300

Abstract:

Methods and systems are described for processing a signal in wireless communications. The signal may have synchronization information. A method of processing a signal having synchronization information may include receiving the signal, and determining a truncation region of the time domain estimated channel, the estimated channel having taps. The method further includes processing the channel taps within the truncation region.