IEC 61834-3:1999

Foreword
1 General
      1.1 Scope
      1.2 Normative References
      1.3 Definitions, Symbols and Abbreviations
      1.4 Environment and Test Conditions
      1.5 Reference Tape
      1.6 Calibration Tape
2 Helical Recordings
      2.1 Tape Speed
      2.2 Record Location and Dimensions
3 Programme Track Data Arrangement
      3.1 Introduction
      3.2 Labelling Convention
      3.3 Audio Sector
      3.4 Video Sector
      3.5 Subcode Sector
4 Audio Interface
5 Video Interface
6 Audio Signal Processing
      6.1 Introduction
      6.2 Error Correction Code
      6.3 Randomization Pattern
      6.4 Audio Encoding
      6.5 Audio Channel Allocation
      6.6 Frame Structure
      6.7 Shuffling Method
      6.8 Audio Auxiliary Data (AAUX)
      6.9 Invalid Recording
7 Video Signal Processing
      7.1 Introduction
      7.2 Error Correction Code
      7.3 Randomization Pattern
      7.4 Video Structure
      7.5 DCT Processing
      7.6 Quantization
      7.7 Variable Length Coding (VLC)
      7.8 Arrangement of a Compressed Macro Block
      7.9 Arrangement of a Video Segment
      7.10 Data-Sync Block and Compressed Macro Block
      7.11 Video Auxiliary Data (VAUX)
      7.12 Invalid Recording
8 Subcode Signal Processing
      8.1 The Recording Periods of TAG ID
      8.2 The Writing Method of the Optional Area
      8.3 The Rewriting Periods of TAD ID
9 System Data
      9.1 AAUX
      9.2 VAUX
      9.3 Subcode
      9.4 MIC
10 Data Structure for Digital Interface
      10.1 Introduction
      10.2 Data Structure
      10.3 DIF Sequence
      10.4 DIF Block
      10.5 Frame Period
      10.6 Playback Speed
Annex A (normative) 20 Bits Audio for Professional Use
      A.1 - Channel Allocation
      A.2 - Encoding Mode
      A.3 - Audio Error Code
      A.4 - Shuffling Method
Annex B (informative) Manufacturers
      B.1 - Reference Tape
      B.2 - Calibration Tape
      B.3 - Purchase
Figure 1 - Sector arrangement on helical track (1125-60 and
           1250-50 systems)
Figure 2 - 1125-60 system
Figure 3 - 1250-50 system
Figure 4 - Transmitting samples for 1125-60 system
Figure 5 - Transmitting samples for 1250-50 system
Figure 6 - DCT block and the pixel co-ordinates
Figure 7 - DCT block arrangement
Figure 8 - Macro block and DCT block order
Figure 9 - Arrangement of macro blocks for 1125-60 system
Figure 10 - Super blocks and macro blocks in a frame on TV
            screen for 1125-60 system
Figure 11 - Super blocks and macro blocks in a frame on TV
            screen for 1250-50 system
Figure 12 - Macro block order in a super block
Figure 13 - Area number
Figure 14 - The arrangement of a compressed macro block
Figure 15 - The arrangement of a video segment after bit-rate
            reduction
Figure 16 - The relation between the compressed macro block
            number and the data-sync block
Figure 17 - Main area and optional area (1125-60 system)
Figure 18 - Main area and optional area (1250-50 system)
Figure 19 - Data structure for transmission
Figure 20 - Transmission order of DIF blocks in a DIF sequence
Figure 21 - ID data in a DIF block
Figure 22 - Data in the header section
Figure A.1 - Sample to data bytes conversion for 20 bits
Table 1 - Record location and dimensions (1125-60 system,
          1250-50 system)
Table 2 - Sector location from SSA (1125-60 system,
          1250-50 system)
Table 3 - Scanner example (1125-60 system, 1250-50 system)
Table 4 - Sequence number (1125-60 and 1250-50 systems)
Table 5 - Track pair number (1125-60 system)
Table 6 - Track pair number (1250-50 system)
Table 7 - Construction of an audio block
Table 8 - Basic channel allocation rule in multi-stereo audio
Table 9 - Channel allocation rule for lumped audio
Table 10 - The number of audio samples per frame
           (unlocked mode)
Table 11 - The allowance range of the accumulated difference
           value between the numbers of audio samples per
           frame in synchronous channels
Table 12 - The number of audio samples per frame (locked mode)
Table 13 - The construction of video signal sampling (12:4:4)
Table 14 - An example of the classification for reference
Table 15 - Quantization step
Table 16 - AAUX data of the main area
Table 17 - VAUX data of the main area
Table 18 - TIA data in the header section
Table 19 - DIF blocks and subcode sync blocks
Table 20 - DIF blocks and VAUX data-sync blocks
Table 21 - DIF blocks and audio data-sync blocks
Table 22 - DIF blocks and compressed macro blocks
Table A.1 - Basic channel allocation rule

Establishes basic principles applicable to the next generation of digital video cassette recording systems for consumer use for the interest of both users and manufacturers. Specifies the content, format and recording method of the data blocks forming the helical records on the tape containing audio, video, and system data. Describes the specifications for the 1125-line system with a frame frequency of 30,00 Hz and the 1250-line system with a frame frequency of 25,00 Hz.