Prasanjit Panda

US Patent:

8009963, Aug 30, 2011

Filed:

Mar 16, 2006

Appl. No.:

11/378567

Inventors:

Prasanjit Panda - San Diego CA, US
Khaled Helmi El-Maleh - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04N 9/80
H04N 5/78
H04N 5/93
H04N 5/917
H04N 9/65
H04N 9/67
H04N 9/77
H04N 11/02
H04N 11/20
G06F 17/00
G10L 21/04

US Classification:

386248, 386285, 386323, 386328, 3484171, 348450, 348452, 348642, 348712, 348713, 37524006, 37524012, 37524016, 37524025, 37524029, 700 94, 703500, 703503

Abstract:

This disclosure describes adaptive filtering techniques to improve the quality of captured imagery, such as video or still images. In particular, this disclosure describes adaptive filtering techniques that filter each pixel as a function of a set of surrounding pixels. An adaptive image filter may compare image information associated with a pixel of interest to image information associated with a set of surrounding pixels by, for example, computing differences between the image formation associated with the pixel of interest and each of the surrounding pixels of the set. The computed differences can be used in a variety of ways to filter image information of the pixel of interest. In some embodiments, for example, the adaptive image filter may include both a low pass component and high pass component that adjust as a function of the computed differences.

US Patent:

8340172, Dec 25, 2012

Filed:

Mar 10, 2005

Appl. No.:

11/077697

Inventors:

Prasanjit Panda - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04N 7/12
H04N 11/02
H04N 11/04

US Classification:

37524003

Abstract:

This disclosure describes rate control techniques that can improve video encoding. The described rate control techniques exploit relationships between the number of bits encoded per frame and the number of non-zero coefficients of the video blocks after quantization. The number of number of non-zero coefficients of the video blocks after quantization is referred to as rho (ρ). The value of ρ is generally proportional to the number of bits used in the video encoding. This disclosure utilizes a relationship between ρ and a quantization parameter (QP) in order to achieve rate controlled video encoding. More specifically, this disclosure exploits a parametric equation to map a value of a predicted ρ to a QP.

US Patent:

20070171988, Jul 26, 2007

Filed:

Mar 16, 2006

Appl. No.:

11/384106

Inventors:

Prasanjit Panda - San Diego CA, US
Khaled El-Maleh - San Diego CA, US

International Classification:

H04B 1/66

US Classification:

375240290

Abstract:

This disclosure describes adaptive filtering techniques to improve the quality of captured imagery, such as video or still images. In particular, this disclosure describes adaptive filtering techniques that filter each pixel as a function of a set of surrounding pixels. An adaptive image filter may compare image information associated with a pixel of interest to image information associated with a set of surrounding pixels by, for example, computing differences between the image information associated with the pixel of interest and each of the surrounding pixels of the set. The computed differences can be used in a variety of ways to filter image information of the pixel of interest. In some embodiments, for example, the adaptive image filter may include both a low pass component and high pass component that adjust as a function of the computed differences.

US Patent:

20140056145, Feb 27, 2014

Filed:

Aug 23, 2013

Appl. No.:

13/975030

Inventors:

Hyukjune Chung - San Diego CA, US
Prasanjit Panda - San Diego CA, US

Assignee:

QUALCOMM INCORPORATED - SAN DIEGO CA

International Classification:

H04W 28/10

US Classification:

370235

Abstract:

Methods, apparatus, and computer readable media may adjust an encoding rate based on network conditions between a transmitter and a receiver. Either the transmitter, receiver, or both the transmitter and receiver may determine the encoding rate. In one aspect, a ratio of received network data to transmitted network data is determined. An encoding parameter is then determined based on the determined ratio. In one aspect, the encoding parameter may be used to adjust an encoder. In another aspect, the determined encoding parameter may be transmitted to an encoding or transmitting node. In another aspect, an amount of data buffered in a network is determined. A sustainable throughput of the network is also determined. A transmission rate is then determined based on the sustainable throughput and the amount of data buffered. An encoding parameter is then adjusted based on the transmission rate.

US Patent:

20140056162, Feb 27, 2014

Filed:

Aug 22, 2013

Appl. No.:

13/973885

Inventors:

Hyukjune Chung - San Diego CA, US
Prasanjit Panda - San Diego CA, US

Assignee:

Qualcomm Incorporated - San Diego CA

International Classification:

H04L 12/26
H04N 7/26

US Classification:

370252

Abstract:

Methods, apparatus, and computer readable media may adjust an encoding rate based on network conditions between a transmitter and a receiver. Either the transmitter, receiver, or both the transmitter and receiver may determine the encoding rate. In one aspect, a ratio of received network data to transmitted network data is determined. An encoding parameter is then determined based on the determined ratio. In one aspect, the encoding parameter may be used to adjust an encoder. In another aspect, the determined encoding parameter may be transmitted to an encoding or transmitting node. In another aspect, an amount of data buffered in a network is determined. A sustainable throughput of the network is also determined. A transmission rate is then determined based on the sustainable throughput and the amount of data buffered. An encoding parameter is then adjusted based on the transmission rate.

US Patent:

20140059167, Feb 27, 2014

Filed:

Aug 22, 2013

Appl. No.:

13/973907

Inventors:

Hyukjune Chung - San Diego CA, US
Prasanjit Panda - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04W 8/00

US Classification:

709217

Abstract:

Methods, apparatus, and computer readable media may adjust an encoding rate based on network conditions between a transmitter and a receiver. Either the transmitter, receiver, or both the transmitter and receiver may determine the encoding rate. In one aspect, a ratio of received network data to transmitted network data is determined. An encoding parameter is then determined based on the determined ratio. In one aspect, the encoding parameter may be used to adjust an encoder. In another aspect, the determined encoding parameter may be transmitted to an encoding or transmitting node. In another aspect, an amount of data buffered in a network is determined. A sustainable throughput of the network is also determined. A transmission rate is then determined based on the sustainable throughput and the amount of data buffered. An encoding parameter is then adjusted based on the transmission rate.

US Patent:

20140071819, Mar 13, 2014

Filed:

Aug 23, 2013

Appl. No.:

13/974906

Inventors:

Hyukjune Chung - San Diego CA, US
Prasanjit Panda - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04W 28/02

US Classification:

370230

Abstract:

Methods, apparatus, and computer readable media determine a transmission rate. In some aspects, a method includes determining, via an electronic device, an amount of data buffered in a network, determining a sustainable throughput of the network; and determining a transmission rate based at least in part on the sustainable throughput and the amount of data buffered.

US Patent:

20180332281, Nov 15, 2018

Filed:

May 11, 2018

Appl. No.:

15/977590

Inventors:

- San Diego CA, US
In Suk Chong - San Diego CA, US
Xianglin Wang - San Diego CA, US
Prasanjit Panda - San Diego CA, US
Mayank Tiwari - San Diego CA, US
Marta Karczewicz - San Diego CA, US
Shashidhar Jangili - Hyderabad, IN

International Classification:

H04N 19/107
H04N 19/124
H04N 19/177
H04N 19/91
H04N 19/176

Abstract:

This disclosure describes techniques for achieve high coding efficiency by periodically encoding anchor frames with a lower Quantization Parameter (QP) to provide better prediction for the following frames. Techniques include adaptively deciding which frames are encoded with lower QP by use of the collected encoding statistics via an encoding scheme with or without rate control.