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