On 2014-03-30, Ralf R Radermacher wrote:
...the sample clock was locked to twice the horizontal scan rate of
15625Hz, i.e. 31.25kHz.
Wasn't that the rate used for PCM audio in Hi8 video recorders?
Apparently so, and for the same precise reason. That applies to Hi8
derived from PAL, and with PCM -- PCM sound was a later addition to the
standard which was originally fully analog. For Hi8 over NTSC the
corresponding frequency is 31.46853kHz. That comes from the revised
59.94Hz field rate adopted in the color transition, divided by 525
scanlines per field.
--
Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy.iki.fi/front
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