IEC 61834-2:1998

Contents
Foreword
1. General
2. Helical recordings
3. Programme track data arrangement
4. Audio interface
5. Video interface
6. Audio signal processing
7. Video signal processing
8. Subcode signal processing
9. System data
10. MIC (memory in cassette)
11. Data structure for digital interface
Annex A (normative) DCT-operation precision
Annex B (normative) Data through the digital interface
Annex C (informative) Manufacturers
Annex D (informative) Bibliography
Tables
1 - Sector location from SSA (525-60 system)
2 - Sector location from SSA (625-50 system)
3 - Scanner example
4 - Application ID of area 1 (AP1)
5 - Sequence number (525-50 system)
6 - Sequence number (625-50 system)
7 - Track pair number (525-60 system)
8 - Track pair number (625-50 system)
9 - Application ID of area 2 (AP2)
10 - Application ID of area 3 (AP3)
11 - Randomization pattern used for a pre-sync block and a
     post-sync block
12 - Randomization pattern used for a data-sync block
13 - Audio encoding mode in an audio block
14 - The construction of an audio block
15 - Basic channel allocation rule in SD-2ch audio
16 - Basic channel allocation rule in SD-4ch audio
17 - The number of audio samples per frame (unlocked mode)
18 - The allowance range of the accumulated difference value
     between the numbers of audio samples per frame in CH1
     and CH2
19 - The number of audio samples per frame (locked mode)
20 - The construction of video signal sampling (4:2:2)
21 - Class number and the DCT block
22 - An example of the classification for reference
23 - Quantization step
24 - Length of code-words
25 - Code-words of variable length coding
26 - Definition of STA
27 - Code-words of the QNO
28 - Randomization pattern used for a subcode-sync block
29 - Subcode data of the main area and recommended data
     of the optional area for no optional use (for user's tape)
30 - Subcode data of the main area and recommended data of the
     optional area for no optional use (for pre-recorded tape)
31 - AAUX data of the main area
32 - VAUX data of the main area
33 - Event header packs
34 - Inconsistency status of events by ME flag and TT flag
35 - Relation of memory size and applied protocol
36 - DIF block type
37 - DIF sequence number (525-60 system)
38 - DIF sequence number (625-50 system)
39 - TIA data in the header section
40 - DIF blocks and subcode sync blocks
41 - DIF blocks and VAUX data-sync blocks
42 - DIF blocks and audio data-sync blocks
43 - DIF blocks and compressed macro blocks
B.1 - Definition of the symbols
B.2 - Definition of the additional symbols about the delays
B.3 - Method of transmitting and recording data of header DIF
      block
B.4 - Method of transmitting and recording data of subcode
      DIF block
B.5 - Method of transmitting and recording data of VAUX DIF
      block
B.6 - Method of transmitting and recording data of AAUX
B.7 - Method of transmitting and recording data of a video
      DIF block
B.8 - Playback or transmitting error for the symbol C
Figures
1 - Record location and dimensions
2 - Sector location from SSA
3 - Sector arrangement on helical track (525-60 system)
4 - Sector arrangement on helical track (625-50 system)
5 - Frame and tracks (525-60 system)
6 - Frame and tracks (625-50 system)
7 - Structure of sync blocks in audio sector
8 - ID data in audio sector
9 - Bit assignment of ID code-words
10 - Structure of sync blocks in video sector
11 - ID data in video sector
12 - Structure of sync blocks in subcode sector
13 - ID data in subcode sector
14 - Data and inner parity of a data-sync block
15 - Data and outer parity of a data-sync block for audio
     sector
16 - The 16- 12 compressing rule
17 - Sample to data bytes conversion for 16 bits
18 - Sample to data bytes conversion for 12 bits
19 - Audio shuffling pattern for 525-60 system: 48k mode/44,1k
     mode/32k mode
20 - Audio shuffling pattern for 625-50 system: 48k mode/44,1k
     mode/32k mode
21 - Audio shuffling pattern for 525-60 system: 32k-2ch mode
22 - Audio shuffling pattern for 625-50 system: 32k-2ch mode
23 - Data and outer parity of a data-sync block for video
     sector
24 - Transmitting samples for 525-60 system
25 - Transmitting samples for 625-50 system
26 - DCT block and the pixel coordinate
27 - The rightmost DCT block in colour difference signal for
     525-60 system
28 - DCT block arrangement for 525-60 system
29 - DCT block arrangement fpr 625-50 system
30 - Macro block and DCT blocks
31 - Super blocks and macro blocks in a frame on TV screen
     for 525-60 system
32 - Super blocks and macro blocks in a frame on TV screen
     for 625-50 system
33 - Macro block order in a super block for 525-60 system
34 - Macro block order in a super block for 625-50 system
35 - The output order of a weighted DCT block
36 - Area numbers
37 - The arrangement of a compressed macro block
38 - The arrangement of a video segment after the bit rate
     reduction
39 - The video error code
40 - The relation between the compressed macro block number
     and the data-sync block
41 - Bit assignment for the subcode data and subcode parity
42 - Structure of ID data
43 - Structure of the absolute track number
44 - Recommendation for the recording start position of a
     tape
45 - Numbering of the absolute track number for invalid
     tracks
46 - Main area and optional area (525-60 system)
47 - Main area and optional area (625-50 system)
48 - The layers of the pack
49 - Arrangement of AAUX packs in audio sector
50 - Arrangement of VAUX packs in VAUX sync blocks
51 - The layers of tape
52 - The division of tape
53 - An example of recorded topic data on tape
54 - Recording order of topic data
55 - Text unit for simple mode
56 - Data structure of space 0
57 - Optional events order of space 0
58 - MIC contents of new cassette tape
59 - Examples of pack arrangement for optional events
60 - State transition of ME flag and TT flag
61 - Multi-bytes writing operation for the I2C protocol
62 - An example of multi-bytes reading operation for I2C
     protocol
63 - Block diagram on the digital interface
64 - Data structure for transmission
65 - Transmission order of DIF blocks in a DIF sequence
66 - ID data in a DIF block
67 - Data in the header section
68 - Data in the subcode section
69 - Data in the VAUX section
70 - Data in the audio section
71 - Data in the video section
A.1 - Measurement method of DCT operation precision

Specifies the content, format and recording method of the data blocks forming the helical records on the tape containing audio, video, and system data. It describes the specifications for the 525-line system with a frame frequency of 29,97 Hz and 625-line system with a frame frequency of 25,00 Hz. One video channel and two independent audio channels are recorded in the digital format.