1
Gary A Demos: Moving image compression quality enhancement using displacement filters with negative lobes. Dolby Laboratories Licensing Corporation, Fish & Richardson P C, April 27, 2004: US06728317 (387 worldwide citation)

A method and apparatus for image compression using temporal and resolution layering of compressed image frames. In particular, layered compression allows a form of modularized decomposition of an image that supports flexible application of a variety of image enhancement techniques. Further, the inve ...


2
Grant A Davidson: Adaptive-block-length, adaptive-transforn, and adaptive-window transform coder, decoder, and encoder/decoder for high-quality audio. Dolby Laboratories Licensing Corporation, Thomas A Gallagher, David N Lathrop, February 28, 1995: US05394473 (300 worldwide citation)

The invention relates in general to high-quality low bit-rate digital transform coding and decoding of information corresponding to audio signals such as music signals. More particularly, the invention relates to signal analysis/synthesis in coding and decoding. The invention can optimize the trade ...


3
Mark Franklin Davis, Craig Campbell Todd: Coding method and apparatus for multiple channels of audio information representing three-dimensional sound fields. Dolby Laboratories Licensing Corporation, David N Lathrop, Gallagher & Lathrop, February 1, 2000: US06021386 (215 worldwide citation)

In an encoder, multiple channels of audio information representing multidimensional sound fields are split into subband signals and the subband signals in one or more subbands are combined to form composite signals. The composite signals, the subband signals not combined into a composite signal and ...


4
Mark F Davis, Craig C Todd, Ray M Dolby: Encoder/decoder for multidimensional sound fields. Dolby Laboratories Licensing Corporation, Thomas A Gallagher, David N Lathrop, December 10, 1996: US05583962 (174 worldwide citation)

Two or more audio channels (i.e.--stereo, 4-channel surround, etc.) are each divided into frequency subbands to be coarsely quantized. An adaptive bit allocation scheme is then applied to subbands which are combined across channels such that equivalent subbands (i.e.--same frequency band) from each ...


5
Mark Franklin Davis, Matthew Conrad Fellers: Method and apparatus for encoding and decoding multiple audio channels at low bit rates using adaptive selection of encoding method. Dolby Laboratories Licensing Corporation, David N Lathrop, Gallagher & Lathrop, March 30, 1999: US05890125 (172 worldwide citation)

A split-band coding system combines multiple channels of input signals into various forms of composite signals and generates spatial-characteristic signals representing soundfield spatial characteristics in a plurality of frequency subbands. The spatial-characteristics signals may be generated in ei ...


6
Louis D Fielder, Grant A Davidson: Low bit rate transform coder, decoder, and encoder/decoder for high-quality audio. Dolby Laboratories Licensing Corporation, Thomas A Gallagher, David N Lathrop, April 28, 1992: US05109417 (158 worldwide citation)

Quantizing noise is lessened in a speech signal system by using adaptive bit allocation for subband channels, wherein subband information of digital words is represented in block-floating-point form, and normalized mantiss as may allow dropping a sign bit.


7
Gary A Demos: Interpolation of video compression frames. Dolby Laboratories Licensing Corporation, Fish & Richardson P C, November 9, 2004: US06816552 (135 worldwide citation)

A method, system, and computer programs for improving the image quality of one or more bi-directionally predicted intermediate frames in a video image compression system, where each frame comprises a plurality of pixels. In one aspect, the invention includes determining the value of each pixel of ea ...


8
Mark F Davis, Craig C Todd, Ray Milton Dolby: Encoder/decoder for multidimensional sound fields. Ray Milton Dolby, Dolby Laboratories Licensing Corporation, Thomas A Gallagher, David N Lathrop, May 20, 1997: US05632005 (128 worldwide citation)

An adaptive high-fidelity perceptual subband encoder for spatially directional multichannel audio signals, using a mixture of individual-channel subband coding with subband-steered composite-channel signal coding that combines the spectral components of the individual channel subbands selected for s ...


9
Loius D Fielder: Low time-delay transform coder, decoder, and encoder/decoder for high-quality audio. Dolby Laboratories Licensing Corporation, Thomas A Gallagher, David N Lathrop, June 22, 1993: US05222189 (120 worldwide citation)

A low bit-rate (192 kBits per second) transform encoder/decoder system (44.1 kHz or 48 kHz sampling rate) for high-quality music applications employs short time-domain sample blocks (128 samples/block) so that the system signal propagation delay is short enough for real-time aural feedback to a huma ...


10
Louis D Fielder, Marina Bosi Goldberg, Grant A Davidson, Kenneth J Gundry: Digital audio limiter. Dolby Laboratories Licensing Corporation, Thomas A Gallagher, David N Lathrop, November 26, 1996: US05579404 (114 worldwide citation)

A signal processing system comprising components such as split-band perceptual coders can receive a peak amplitude limited input audio signal and can process the signal in such a manner that the processed signal preserves the apparent loudness of the input signal but is no longer peak-amplitude limi ...



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