576i - Baseband Interoperability (analogue)

Baseband Interoperability (analogue)

When 576i video is transmitted via baseband (i.e., via consumer device cables, not via RF), most of the differences between the "one-letter" systems are no longer significant, other than vertical resolution and frame rate.

In this context, unqualified 576i invariably means

  • 625 lines per frame, of which 576 carry picture content
  • 25 frames per second interlaced yielding 50 fields per second
  • Two interlaced video fields per frame
  • With PAL or SECAM colour (4.43 MHz or 3.58 MHz (576i-N & 576i-NC))
  • Frequency modulated or amplitude modulated audio (mono)
  • Mono or stereo audio, if sent via connector cables between devices

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