Invention Grant
- Patent Title: Multidimensional quantization techniques for video coding/decoding systems
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Application No.: US17493607Application Date: 2021-10-04
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Publication No.: US11539974B2Publication Date: 2022-12-27
- Inventor: Alexandros Tourapis , Yeping Su , David Singer , Hsi-Jung Wu
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: BakerHostetler
- Main IPC: H04N19/50
- IPC: H04N19/50 ; H04N19/184 ; H04N19/167 ; H04N19/436 ; H04N19/186 ; H04N19/132 ; H04N19/124 ; H04N19/13 ; H04N19/15 ; H04N19/30 ; H04N19/42 ; H04N19/48 ; H04N19/182

Abstract:
Video compression and decompression techniques are disclosed that provide improved bandwidth control for video compression and decompression systems. In particular, video coding and decoding techniques quantize input video in multiple dimensions. According to these techniques, pixel residuals may be generated from a comparison of an array of input data to an array of prediction data. The pixel residuals may be quantized in a first dimension. After the quantization, the quantized pixel residuals may be transformed to an array of transform coefficients. The transform coefficients may be quantized in a second dimension and entropy coded. Decoding techniques invert these processes. In still other embodiments, multiple quantizers may be provided upstream of the transform stage, either in parallel or in cascade, which provide greater flexibility to video coders to quantize data in different dimensions in an effort to balance the competing interest in compression efficiency and quality of reconstructed video.
Public/Granted literature
- US20220103851A1 MULTIDIMENSIONAL QUANTIZATION TECHNIQUES FOR VIDEO CODING/DECODING SYSTEMS Public/Granted day:2022-03-31
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