Invention Grant
- Patent Title: Smooth rewind media playback
- Patent Title (中): 平滑的倒带媒体播放
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Application No.: US13008797Application Date: 2011-01-18
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Publication No.: US08391688B2Publication Date: 2013-03-05
- Inventor: Wenbo Zhang , Yongjun Wu , Kim-chyan Gan , Eric Christoffersen
- Applicant: Wenbo Zhang , Yongjun Wu , Kim-chyan Gan , Eric Christoffersen
- Applicant Address: US WA Redmond
- Assignee: Microsoft Corporation
- Current Assignee: Microsoft Corporation
- Current Assignee Address: US WA Redmond
- Agency: Alleman Hall McCoy Russell & Tuttle LLP
- Main IPC: H04N5/92
- IPC: H04N5/92

Abstract:
Systems and methods for smooth rewind playback of streamed media are provided. The media includes relatively-encoded frames and independently-encoded frames. The method includes receiving a rewind request indicating a rewind speed for rewind playback of the media, selectively dropping relatively-encoded frame(s) based on a receipt constraint and a decoding constraint to form a subset of the media, and receiving frames of the subset. The method further includes selecting, in a reverse order, a selected group of pictures (GOP) included within the subset, and decoding relatively-encoded frame(s) of the GOP in a forward sequential frame order. The method further includes caching relatively-encoded frame(s) of the GOP in the forward sequential frame order, and when caching, dropping and overwriting relatively-encoded frame(s) of the GOP selectively according to a memory constraint and/or a display constraint. The method further includes displaying relatively-encoded frame(s) of the GOP in a reverse sequential frame order.
Public/Granted literature
- US20120093489A1 SMOOTH REWIND MEDIA PLAYBACK Public/Granted day:2012-04-19
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