1
Ming Chieh Lee, Wei ge Chen: Image compression and affine transformation for image motion compensation. Microsoft Corporation, Klarquist Sparkman Campbell Leigh & Whinston, October 19, 1999: US05970173 (234 worldwide citation)

A transformation method provides a multi-dimensional affine transformation for representing motion between corresponding image components of successive video image frames. The multi-dimensional affine transformations can represent complex motion that includes any or all of translation, rotation, mag ...


2
Ming Chieh Lee, Wei ge Chen: Transparent block skipping in object-based video coding systems. Microsoft Corporation, Klarquist Sparkman Campbell Leigh & Whinston, May 5, 1998: US05748789 (191 worldwide citation)

A method implemented in an object-based video encoder or decoder uses shape information that describes the boundary of a group of pixels representing an object in a sequence of video frames to identify transparent blocks (e.g., macroblocks or blocks so that coding/decoding of these blocks can be ski ...


3
Ming Chieh Lee, Wei ge Chen: Video coding using adaptive coding of block parameters for coded/uncoded blocks. Microsoft Corporation, Klarquist Sparkman Campbell Leigh & Whinston, August 31, 1999: US05946043 (169 worldwide citation)

Video coding efficiency for high motion scenes is improved by adaptively disabling a parameter indicating whether texture and motion data is coded for a macroblock. The COD parameter is disabled when the number of macroblocks with substantially all zero motion and texture data is less than a thresho ...


4
Ming Chieh Lee, Wei ge Chen: Method and system for unrestricted motion estimation for video. Microsoft Corporation, Klarquist Sparkman Campbell Leigh & Whinston, November 25, 1997: US05692063 (105 worldwide citation)

Motion estimation plays a very important role in a video compression scheme. It is well known that in a video compression scheme, there exists a high temporal correlation between consecutive video image frames. However, it is difficult to do motion estimation for newly exposed objects, since there i ...


5
Wei ge Chen, Ming Chieh Lee: Entrophy code mode switching for frequency-domain audio coding. Microsoft Corporation, Klarquist Sparkman, October 9, 2001: US06300888 (104 worldwide citation)

A frequency-domain audio coder selects among different entropy coding modes according to characteristics of an input stream. In particular, the input stream is partitioned into frequency ranges according to some statistical criteria derived from a statistical analysis of typical or actual input to b ...


6
Wei Ge Chen, Naveen Thumpudi, Ming Chieh Lee: Quantization matrices based on critical band pattern information for digital audio wherein quantization bands differ from critical bands. Microsoft Corporation, Klarquist Sparkman, August 23, 2005: US06934677 (97 worldwide citation)

Quantization matrices facilitate digital audio encoding and decoding. An audio encoder generates and compresses quantization matrices; an audio decoder decompresses and applies the quantization matrices. The invention includes several techniques and tools, which can be used in combination or separat ...


7
Wei ge Chen, Ming Chieh Lee: Multi-level run length coding for frequency-domain audio coding. Microsoft Corporation, Klarquist Sparkman Campbell Leigh & Whinston, April 24, 2001: US06223162 (86 worldwide citation)

A technique for entropy coding information relating to frequency domain audio coefficients. For portions of a frequency spectrum having a predominate value of zero, a multi-level run length encoder statistically correlates sequences of zero values with non-zero values and assigns variable length cod ...


8
Ming Chieh Lee, Wei ge Chen: Transform coding of dense motion vector fields for frame and object based video coding applications. Microsoft Corporation, Klarquist Sparkman Campbell Leigh & Whinston, September 28, 1999: US05959673 (85 worldwide citation)

A video compression encoding process compresses or encodes dense motion vector fields to provide and improved compression ratio. In accordance with this method, a dense motion vector field is obtained for an object or a portion of an object between a pair of video image frames. The dense motion vect ...


9
Chih lung Bruce Lin, Ming Chieh Lee, Wei ge Chen: Overlapped motion compensation for object coding. Microsoft Corporation, Klarquist Sparkman Campbell Leigh & Whinston, November 9, 1999: US05982438 (79 worldwide citation)

To represent the motion of a pixel between successive image frames, this method utilizes the motion information for the transformation block containing the pixel, as well as the motion information for adjacent transformation blocks whenever the adjacent transformation blocks are associated with the ...


10
Wei Ge Chen, Naveen Thumpudi, Ming Chieh Lee: Quality and rate control strategy for digital audio. Microsoft Corporation, Klarquist Sparkman, April 11, 2006: US07027982 (75 worldwide citation)

An audio encoder regulates quality and bitrate with a control strategy. The strategy includes several features. First, an encoder regulates quantization using quality, minimum bit count, and maximum bit count parameters. Second, an encoder regulates quantization using a noise measure that indicates ...



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