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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