1
Yu Li You, William Paul Smith, Zoran Fejzo, Stephen Smyth: Sound quality of established low bit-rate audio coding systems without loss of decoder compatibility. Digital Theater Systems, Koppel & Jacobs, May 1, 2001: US06226616 (140 worldwide citation)


A multi-channel audio compression technology is presented that extends the range of sampling frequencies compared to existing technologies and/or lowers the noise floor while remaining compatible with those earlier generation technologies. The high-sampling frequency multi-channel audio is decompose ...


2
Zoran Fejzo: Lossless multi-channel audio codec. Blake Welcher, William Johnson, Eric Gifford, June 24, 2008: US07392195 (47 worldwide citation)


A lossless audio codec segments audio data within each frame to improve compression performance subject to a constraint that each segment must be fully decodable and less than a maximum size. For each frame, the codec selects the segment duration and coding parameters, e.g., a particular entropy cod ...


3
Zoran Fejzo: Scalable lossless audio codec and authoring tool. September 18, 2007: US07272567 (19 worldwide citation)


An audio codec losslessly encodes audio data into a sequence of analysis windows in a scalable bitstream. This is suitably done by separating the audio data into MSB and LSB portions and encoding each with a different lossless algorithm. An authoring tool compares the buffered payload to an allowed ...


4
Zoran Fejzo: Multi-channel audio coding/decoding of random access points and transients. DTS, William L Johnson, Guarav K Mohindra, Eric A Gifford, April 19, 2011: US07930184 (6 worldwide citation)


A lossless audio codec encodes/decodes a lossless variable bit rate (VBR) bitstream with random access point (RAP) capability to initiate lossless decoding at a specified segment within a frame and/or multiple prediction parameter set (MPPS) capability partitioned to mitigate transient effects. This ...


5
Zoran Fejzo: Scalable lossless audio codec and authoring tool. DTS, Blake A Welcher, William L Johnson, Eric A Gifford, February 23, 2010: US07668723 (4 worldwide citation)


An audio codec losslessly encodes audio data into a sequence of analysis windows in a scalable bitstream. This is suitably done by separating the audio data into MSB and LSB portions and encoding each with a different lossless algorithm. An authoring tool compares the buffered payload to an allowed ...


6
Zoran Fejzo: Scalable lossless audio codec and authoring tool. DTS, William Johnson, Guarav Mohindra, February 12, 2013: US08374858 (1 worldwide citation)


An audio codec losslessly encodes audio data into a sequence of analysis windows in a scalable bitstream. This is suitably done by separating the audio data into MSB and LSB portions and encoding each with a different lossless algorithm. An authoring tool compares the buffered payload to an allowed ...


7
Zoran Fejzo: Lossless multi-channel audio codec. DTS, William L Johnson, Gaurav K Mohindra, Eric A Gifford, August 7, 2012: US08239210 (1 worldwide citation)


A lossless audio codec segments audio data within each frame to improve compression performance subject to a constraint that each segment must be fully decodable and less than a maximum size. For each frame, the codec selects the segment duration and coding parameters, e.g., a particular entropy cod ...


8
Zoran Fejzo, James D Johnston: Room characterization and correction for multi-channel audio. DTS, Blake Welcher, William Johnson, Craig S Fischer, May 12, 2015: US09031268 (1 worldwide citation)


Devices and methods are adapted to characterize a multi-channel loudspeaker configuration, to correct loudspeaker/room delay, gain and frequency response or to configure sub-band domain correction filters.


9
Zoran Fejzo: Post-encoding bitrate reduction of multiple object audio. DTS, William Johnson, Craig Fischer, February 7, 2017: US09564136


A post-encoding bitrate reduction system and method for generating one more scaled compressed bitstreams from a single encoded plenary file. The plenary file contains multiple audio object files that were encoded separately using a scalable encoding process having fine-grained scalability. Activity ...


10
Jeffrey Kenneth Thompson, Zoran Fejzo: Multiplet-based matrix mixing for high-channel count multichannel audio. DTS, Blake Welcher, William Johnson, Craig Fischer, January 24, 2017: US09552819


A multiplet-based spatial matrixing codec and method for reducing channel counts (and thus bitrates) of high-channel count (seven or more channels) multichannel audio, optimizing audio quality by enabling tradeoffs between spatial accuracy and basic audio quality, and converting audio signal formats ...



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