Apple inc. (20240429938). Lossy Compression Techniques
Contents
Lossy Compression Techniques
Organization Name
Inventor(s)
Tyson J. Bergland of Sunnyvale CA (US)
Karthik Ramani of San Jose CA (US)
Stephan Lachowsky of San Francisco CA (US)
Justin A. Hensley of Mountain View CA (US)
Davoud A. Jamshidi of San Francisco CA (US)
Lossy Compression Techniques
This abstract first appeared for US patent application 20240429938 titled 'Lossy Compression Techniques
Original Abstract Submitted
techniques are disclosed relating to compression of pixel data using different quantization for different regions of a block of pixels being compressed. in some embodiments, compression circuitry is configured to determine, for multiple components included in pixels of the block of pixels being compressed, respective smallest and greatest component values in respective regions of the block of pixels. the compression circuitry may determine, based on the determined smallest and greatest component values, to use a first number of bits to represent delta values relative to a base value for a first component in a first region and a second, different number of bits to represent delta values relative to a base value for a second component in the first region. the compression circuitry may then quantize delta values for the first and second components of pixels in the first region of the block of pixels using the determined first and second numbers of bits. in some embodiments, the compression circuitry determines whether to provide cross-component bit sharing within a region.
