SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
VCP modules have increased the traceback soft decision memory and output FIFO compared to the memory. The Traceback soft decision memory size has been increased from 1024 × 96 bits to 2048 × 64 bits. The output FIFO memory has been increased from 32 × 64 bits to 64 × 64 bits. In addition, the soft decision resolution is increased internally to 13 bits and is clipped to 8 bits when output from VCP module. These memory sizes have an effect on the Fmax parameter (i.e., the maximum frame size for tailed processing), and the (R+C) max parameter (i.e., the maximum sliding window length for mixed/convergent processing).
The VCP version 2 performance is as follows:
The procedure to calculate the reliability length is as follows. (The reliability length cannot be larger than 1920, or C ≤ 1920-(k-1)).
K | Maximum Frame Size | Fmax | (r + c)max | Multiple (m) | Convergent Multiplier (N) | Special Constraint |
---|---|---|---|---|---|---|
9 | 64 | 56 | 60 | 7 | 3, 6 | |
8 | 112 | 105 | 105 | 4 | 3, 6, 9, 12 | |
7 | 192 | 186 | 186 | 6 | 3, 6, 9, 12, 15, 18 | |
6 | 320 | 315 | 315 | 5 | 3, 6, 9, 12, 15, 18 | r ≤ 248 |
5 | 1024 | 1020 | 320 | 4 | 3, 6, 9, 12, 15, 18 | r ≤ 248 |
K | Maximum Frame Size | Fmax | (r + c)max | Multiple (m) | Convergent Multiplier (N) |
---|---|---|---|---|---|
9 | 128 | 120 | 124 | 4 | 3, 6, 9, 12, 15 |
8 | 224 | 217 | 217 | 7 | 3, 6, 9, 12, 15, 18 |
7 | 384 | 378 | 378 | 6 | 3, 6, 9, 12, 15, 18 |
6 | 640 | 635 | 635 | 5 | 3, 6, 9, 12, 15, 18 |
5 | 2048 | 2044 | 2044 | 4 | 3, 6, 9, 12, 15, 18 |