Appendix III – Examples for H.263 encoder/decoder implementations
III.1 Introduction
III.2 Application scenarios
III.2.1 Variable bit-rate
coding for transmission error‑free channels
III.2.2 Fixed bit-rate
coding for transmission over error‑free channels (H.320
or H.324)
III.2.3 Fixed bit-rate
coding for transmission over packet‑switched lossy channels (H.323)
III.2.4 Fixed bit-rate
coding for transmission over highly bit‑error‑prone channels
(Annex C/H.324)
III.3 Common algorithms
III.3.1 Motion estimation
III.3.2 Quantization
III.3.3 Alternative INTER
VLC mode (Annex S)
III.3.4 Advanced
INTRA coding mode (Annex I)
III.3.5
Modified quantization mode (Annex T)
III.4 Algorithms used for individual application scenarios
III.4.1
Mode decision
III.4.2 Rate control
III.5 Decoder post‑processing
III.5.1 De-ringing post‑filter
III.5.2 De-blocking post‑filter
III.5.3 Error detection
III.5.4 Error concealment
III.6 Information capture section
III.6.1 PB-frames mode (Annexes G
and M)
III.6.2 Scalability mode (Annex O)
III.6.3 Reduced-resolution update mode
(Annex Q)
III.6.4 Fast search using
mathematical inequalities
III.6.5 Control of
encoding frame rate
III.6.6 Remarks on
optimized use of the enhanced reference picture selection mode
III.7 References