CMA Size Requirements - 2023.1 English

H.264/H.265 Video Codec Unit v1.2 Solutions LogiCORE IP Product Guide (PG252)

Document ID
PG252
Release Date
2023-05-16
Version
2023.1 English

The following table contains theoretical contiguous memory access (CMA) buffer requirements for the VCU decoder based on resolution and format. The sizes below correspond to one instance of the encoder or decoder. Multiply these by number of streams for multistream use cases. Other elements such as kmssink/v4l2src typically increase the CMA requirements by an additional 10 to 15%.

Table 1. VCU Decoder CMA Requirements
Resolution 4:2:2 10-bit AVC 4:2:2 10-bit HEVC 4:2:2: 8-bit AVC 4:2:2: 8-bit HEVC 4:2:0 10-bit AVC 4:2:0 10-bit HEVC 4:2:0 8-bit AVC 4:2:0 8-bit HEVC
3840×2160 (MB) 665 582 597 513 524 466 473 414

1920×1080 (MB)

258 214 232 190 208 167 188 148
1280×720 (MB) 137 104 120 87 144 82 101 69