Method and system for multiple pass video coding

Details Method and system for multiple pass video coding Method and system for multiple pass video coding

2003-09-17

2008-08-05

Philippe, Gims (Department: 2621)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C348S419100

Reexamination Certificate

active

07408984

ABSTRACT:
A real-time MPEG video coding system with information look-ahead for constant bit rate (CBR) applications, such as, for example, Video-on-Demand (VoD) over ADSL. This scheme employs two MPEG encoders. The second encoder has a buffer to delay the input by an amount of time relative to the first encoder to create a look-ahead window. In encoding, the first encoder collects the information of statistics and rate-quality characteristics. An on-line information processor then uses the collected information to derive the best coding strategy for the second encoder to encode the incoming frames in the look-ahead window. The second encoder uses the encoding parameters from the processor as the coding guide to execute the coding strategy and generate the final bitstream.

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patent: 6037982 (2000-03-01), Coelho
patent: 6466621 (2002-10-01), Cougnard et al.
patent: 6925120 (2005-08-01), Zhang et al.

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