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PRELIMINARY
S3C6400X RISC MICROPROCESSOR
MULTI-FORMAT VIDEO CODEC
21-32
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
Figure 21.22. Intra-prediction block diagram
In case of MPEG-4 encoding, the hardwired prediction mode decision is used. It brings high performance and low
power consumption. The coefficient data of both encoding and decoding is re-ordered automatically based on the
detected prediction mode.
For the H.264 intra-prediction mode in encoding, hardwired mode decision or software-based mode decision is
used. In case of the hardwired mode decision, a probable mode table is downloaded by the BIT processor. This
table is used for the intra-prediction mode decision logic to search the best mode in some candidates. The
number of candidates is configurable. For maximum quality of the encoding, all possible prediction modes could
be estimated.
The availabilities of the neighboring macroblock or block are managed by the BIT processor. The availability is
determined by the slice, macroblock type, and location of current macroblock (or block).