Annex
A – Digital coding
of component television signals for contribution-quality applications at about
34 or 45 Mbit/s
A.1 Scope
A.2 Recommendations and standards
A.3 Definitions, symbols and abbreviations
A.4 Summary specification of component TV codecs for about 34
or 45 Mbit/s
A.5 Video coding and discrete cosine transformation (DCT)
A.6 Quantization of DCT coefficients
A.7 Variable length coding for DCT coefficients and motion vector
differences
A.8 Video framing and forward error correction
A.9 Additional services
A.10 Service multiplex
A.11 Network adaptation
A.12 Scrambling for conditional access of transmitted data
Appendix I – Guidelines for implementation
I.1 Introduction
I.2 Mode choice
I.3 Refresh strategy
I.4 Motion estimation
I.5 Truncation or rounding of coefficients
I.6 Buffer regulation
I.7 Criticality
I.8 Error concealment
I.9 Transmission of composite signals
Appendix II – Results of 34 Mbit/s codec tests
II.1 Codec tested
II.2 Tests carried out and test methods used
II.3 Subjective tests
II.4 Results of subjective tests
II.5 Results of tests of codec recovery time
II.6 Additional observations
II.7 Conclusions
References