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FIMV-MFC V1.0
This command encodes the specific header. The sequence headers must be encoded at start of bit stream and
BIT processor encodes the sequence header at ENC_SEQ_INIT command. In some application like video
telephony the sequence headers must be transferred for error resilience or decoder refreshment. In this case host
set ENC_HEADER command between ENC_PIC_RUN commands to insert the specific header in the bit stream.
The header code of the input header syntax must be set to CMD_ENC_HEADER_CODE register.
DEC_PARA_SET
This command adds sequence parameter set or picture parameter set to decoder in H.264 case
The sequence parameter set or picture parameter set may be conveyed via "out-of-band". In that case host must
transfer the sequence parameter set or picture parameter set to decoder by this command. The sequence
parameter set or picture parameter set must be written to Parameter Buffer of BIT processor in RBSP format prior
to executing this command. BIT processor decodes the transferred sequence/picture parameter and stores
decoded contents. The decoded sequence/picture parameter set is activated at decoding slice header with the
matched sequence/picture parameter set id.
Multiple sequence/picture parameter sets may be delivered to decoder. They are distinguished by different
sequence/picture parameter set id. The sequence parameter set id is encoded as 5 bits (0~31) in sequence
parameter set RBSP. The picture parameter set id is encoded as 8 bits (0 ~ 255). BIT processor can process 32
sequence parameter sets and 256 picture parameter sets. The type (sequence or picture) and size (byte count) of
conveyed sequence/picture parameter set must be delivered to BIT processor by command argument register.
ENC_PARA_SET
This command encodes sequence parameter set or picture parameter set and delivers to host via Parameter
Buffer in H.264 case. In application that conveys sequence/picture parameter sets in "out-of-band", host can
obtain sequence/picture parameter set RBSP by this command.
BIT processor encodes sequence/picture parameter set and encoded RBSP stream is stored to Parameter Buffer
instead of normal bitstream buffer. The encoded byte count of sequence/picture parameter set is returned by
command return register.
Parameter Buffer Management
Parameter buffer is used for input command arguments or output return data at certain commands. The
parameter buffer resides in SDRAM and the start byte address must be set to ParaBufAddr register.
Frame Buffer Address
This is the input command arguments for SET_FRAME_BUF command. For the detailed description refer to
SET_FRAME_BUF command description.
Encoded Macro Block Bit Number
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.
MULTI-FORMAT
VIDEO
CODEC
21-103
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