Invention Grant
US08705619B2 Directional discrete wavelet transform (DDWT) for video compression applications
有权
用于视频压缩应用的定向离散小波变换(DDWT)
- Patent Title: Directional discrete wavelet transform (DDWT) for video compression applications
- Patent Title (中): 用于视频压缩应用的定向离散小波变换(DDWT)
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Application No.: US12962645Application Date: 2010-12-07
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Publication No.: US08705619B2Publication Date: 2014-04-22
- Inventor: Thai-Ha Nguyen , Ali Tabatabai
- Applicant: Thai-Ha Nguyen , Ali Tabatabai
- Applicant Address: JP Tokyo
- Assignee: Sony Corporation
- Current Assignee: Sony Corporation
- Current Assignee Address: JP Tokyo
- Agent John P. O'Banion
- Main IPC: H04N7/30
- IPC: H04N7/30

Abstract:
An apparatus and method for encoding video using directional discrete waveform transforms (DDWT), such as within a codec device. DDWT can be utilized to replace the use of intra transforms and inter transforms within the encoding system. In many ways the output of the DDWT can be compared with that provided using MDDT, however, it does not require a training process while it also provides enhanced encoding of feature edges with desirable visual characteristics. The transforms are applied in at least two passes, along the prediction direction, and then across the prediction direction, instead of being applied in fixed vertical and horizontal directions. Directional scaling is not required prior to the second stage of transforms.
Public/Granted literature
- US20110249724A1 DIRECTIONAL DISCRETE WAVELET TRANSFORM (DDWT) FOR VIDEO COMPRESSION APPLICATIONS Public/Granted day:2011-10-13
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