DDR Memory Footprint 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

DDR memory buffer size depends on the following:

  • Video resolution
  • Chroma sub-sampling
  • Color depth
  • Coding standard

The number of buffers depend on the following:

  • Coding standard – H.264 or H.265
  • Group of Picture (GOP) pattern

The following table shows the worst-case memory footprint for various encoding schemes.

Table 1. Encoder Block Memory Footprint
Examples with Two B-Frames 720p 1080p 2160p
Buffers Per Buffer Total Buffers Per Buffer Total Buffers Per Buffer Total
Source Frame 5 2.3 MB 12 MB 5 5.3 MB 27 MB 5 21.1 MB 106 MB
Reference Frames 3 2.2 MB 7 MB 3 5.0 MB 15 MB 3 19.9 MB 60 MB
Reconstructed Frame 1 2.2 MB 3 MB 1 5.0 MB 5 MB 1 19.9 MB 20 MB
Intermediate Buffers 2 0.0 MB 0 MB 2 0.0 MB 0 MB 2 41.0 MB 83 MB
Motion Vector Buffer 4 0.1 MB 1 MB 4 0.3 MB 1 MB 4 1.0 MB 4 MB
Bitstream Buffer 2 1.1 MB 3 MB 2 2.5 MB 5 MB 2 9.9 MB 20 MB
Other Buffers 1 0.0 MB 1 MB 1 0.0 MB 1 MB 1 0.1 MB 1 MB
Total     27 MB     54     294