H.265 vs. H.264 – Main Difference

✅ H.265 Introduces:

• B-Frames with Adaptive Motion Compensation → More efficient motion estimation.
• CU (Coding Unit) based prediction → Uses flexible block sizes (up to 64×64 pixels) instead of fixed 16×16 macroblocks in H.264.
• More efficient reference frames → H.265 can reference more past/future frames for improved compression.

..0. .... = H.263 Optional PB-frames mode: Normal I- or P-picture

H.265 Continuous Presence Multipoint (CPM): Off → The first bit of this field is 0, meaning CPM is disabled.