1
Atul Puri, Rangarajan Aravind: Adaptive coding and decoding of frames and fields of video. AT&T Bell Laboratories, E S Indyk, July 13, 1993: US05227878 (361 worldwide citation)

Improved compression of digital signals relating to high resolution video images is accomplished by an adaptive and selective coding of digital signals relating to frames and fields of the video images. Digital video input signals are analyzed and a coding type signal is produced in response to this ...


2
Barin Geoffry Haskell, Atul Puri, Richard Virgil Kollarits: Digital multi-view video compression with complexity and compatibility constraints. Lucent Technologies, Darby & Darby, April 25, 2000: US06055012 (204 worldwide citation)

In a system and method for transmitting and displaying multiple different views of a scene, three or more simultaneous scene signals, representing multiple different views of a scene, are provided by an appropriate camera arrangement to a spatial multiplexer. The size and resolution of the scene sig ...


3
Atul Puri: Three dimensional motion compensated video coding. AT&T Bell Laboratories, Barry H Freedman, March 12, 1991: US04999705 (196 worldwide citation)

A video signal encoder uses three dimensional transform coding on blocks of intensity values and then selects the most significant coefficients for further processing by separating the coefficients into several groups have approximately the same energy and thus approximately the same significance. T ...


4
Barin Geoffry Haskell, Atul Puri: Scalable encoding and decoding of high-resolution progressive video. Lucent Technologies, April 21, 1998: US05742343 (164 worldwide citation)

High-resolution, progressive format video signals having high frame rates may be encoded by a base layer encoder and an enhancement layer encoder to provide two kinds of encoded video signals which share a common output channel. These encoded video signals are received at an input of a video receive ...


5
Barin Geoffry Haskell, Atul Puri, Robert Louis Schmidt: Bidirectionally predicted pictures or video object planes for efficient and flexible video coding. AT&T, June 11, 2002: US06404813 (151 worldwide citation)

A method is provided for decoding a bit stream representing an image that has been encoded. The method includes the steps of: performing an entropy decoding of the bit stream to form a plurality of transform coefficents and a plurality of motion vectors; performing an inverse transformation on the p ...


6
Atul Puri, Mehmet Reha Civanlar: Content adaptive video encoder. AT&T, June 21, 2005: US06909745 (129 worldwide citation)

A system for content adaptive encoding and decoding video is disclosed. The system comprises modules for segmenting video content into segments based on predefined classifications or models. Examples of such classifications comprise action scenes, slow scenes, low or high detail scenes, and brightne ...


7
Rangarajan Aravind, Hsueh Ming Hang, Barin G Haskell, Atul Puri: Video signal quantization for an MPEG like coding environment. AT&T Bell Laboratories, Eugene J Rosenthal, Ronald D Slusky, May 25, 1993: US05214507 (123 worldwide citation)

A quantization parameter for use in encoding a region of an image is developed from a) a categorization of the region into one of a predetermined plurality of perceptual noise sensitivity (PNS) classes, b) a level of psycho-visual quality that can be achieved for the encoded version of the image, th ...


8
Atul Puri: Optimized scanning of transform coefficients in video coding. AT&T, Eugene S Indyk, Mark K Young, March 19, 1996: US05500678 (120 worldwide citation)

An improved scanning apparatus and method which allows for increased coding efficiency over conventional zigzag scans is disclosed. The invention advantageously allows for total compatibility with the MPEG-1 standard, and accomodates video sequences which may be composed of both the progressive and ...


9
Atul Puri, A Murat Tekalp, Petrus J L van Beck: Mesh node motion coding to enable object based functionalities within a motion compensated transform video coder. AT&T, January 15, 2002: US06339618 (107 worldwide citation)

A method and apparatus for coding video data permits coding of video information with optional, enhanced functionalities. Video data is coded as base layer data and enhancement layer data. The base layer data includes convention motion compensated transform encoded texture and motion vector data. Op ...


10
Mehmet R Civanlar, Atul Puri: Efficient frequency scalable video decoding with coefficient selection. AT&T Bell Laboratories, Robert P Marley, January 11, 1994: US05278646 (100 worldwide citation)

An improved technique for decoding wherein the number of coefficients to be included in each sub-block is selectable, and a code indicating the number of coefficients within each layer is inserted in the bitstream at the beginning of each encoded video sequence. This technique allows the original ru ...