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Consumer Electronics by S. P. Bali

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CONSOLIDATED CCIR SYSTEM-B STANDARDS

Based on Appendix A of IS : 4545-1968.

The main characteristics of the CCIR system-B for monchrome television, adopted in India are given below.

Video Characteristics
Number of lines per picture 625
Interlace ratio 2 : 1
Field frequency 50 fields/sec
Picture frequency 25 pictures/sec
Line frequency tolerance 15625 lines/sec
  ±0.1%
Aspect ratio 4 : 3
Scanning sequence for lines Left to right
Scanning sequence for fields Top to bottom
Video bandwidth 5 MHz
Approximate gamma of picture signal 0.5
Composite Video Signal Characteristics
Line period H 64 μs
Line blanking period HB 18.5 to 19.2% of H, 11.8 to 12.3 μs
Front porch FP 2 to 2.8% of H, 1.3. to 1.8 μs
Line sync ...

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