Invention Application
- Patent Title: HYBRID SCALABLE CODING
- Patent Title (中): 混合可扩展编码
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Application No.: US11627457Application Date: 2007-01-26
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Publication No.: US20080181298A1Publication Date: 2008-07-31
- Inventor: Xiaojin Shi , Hsi-Jung Wu , James Oliver Normile
- Applicant: Xiaojin Shi , Hsi-Jung Wu , James Oliver Normile
- Applicant Address: US CA Cupertino
- Assignee: APPLE COMPUTER, INC.
- Current Assignee: APPLE COMPUTER, INC.
- Current Assignee Address: US CA Cupertino
- Main IPC: H04N7/32
- IPC: H04N7/32 ; H04N7/26

Abstract:
Systems, apparatuses and methods whereby coded bitstreams are delivered to downstream end-user devices having various performance capabilities. A head-end encoder/video store generates a primary coded bitstream and metadata for delivery to an intermediate re-encoding system. The re-encoding system recodes the primary coded bitstream to generate secondary coded bitstreams based on coding parameters in the metadata. Each secondary coded bitstream is matched to a conformance point of a downstream end-user device. Coding parameters for each conformance point can be derived from the head-end encoder encoding original source video to generate the secondary coded bitstreams and extracting information from the coding process/results. The metadata can then can be communicated as part of the primary coded bitstream (e.g., as SEI) or can be communicated separately. As a result, the complexity of the secondary coded bitstream is appropriately scaled to match the capabilities of the downstream end-user device to which it is delivered.
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