The 6 vertical areas are the L and R channels recorded IIRC, in the sequence of L, R, L, R, L, R and there was an offset in time between all of them so if a crease on the tape went over the heads, the error correction bits (the right side 1/4 of the pattern) could fix the drop outs as they were not simultaneous in the played back sound.
BTW, the error correction was robust, if the tape was damaged and you played it back and didn't hear any clicks or dropouts, it meant the error correction restored the waveform to what was originally recorded.
There was a limitation to the technology however, playing back the recording and copying it onto another machine could not be done in the digital realm, you would incur a D to A conversion and another A to D conversion if you re-recorded it another digital recorder of the era. The VCR did not have either a coax or optical digital output.
The tapes could be copied as video tapes (in the analog realm) and an SP original could be copied in SP and played back OK, the machine didn't do LP, and SLP originals would play, but the copies were unplayable.
I made 6 hour mixtapes, on VHS in SLP from CDs. Worked well enough. My recorder doesn't work any more (machine won't load a tape anymore), I suspect all the digital stuff still works) however, the machine also recorded a simultaneous stereo VHS Hi-Fi track, and that is still playable on any stereo Hi-Fi VHS machine.
VHS Hi-Fi had great audio specs, BTW, way better than cassettes, and rivaling the digital PCM mode. Probably about as good as analog recording ever got. VHS Hi-Fi was also recorded onto the picture area of the videotape, but the Hi-Fi heads were physically skewed or offset from the video tracks, or used a frequency the video didn't use, or was recorded in a deeper layer of the tape, I can't recall precisely how it worked.
BTW, the error correction was robust, if the tape was damaged and you played it back and didn't hear any clicks or dropouts, it meant the error correction restored the waveform to what was originally recorded.
There was a limitation to the technology however, playing back the recording and copying it onto another machine could not be done in the digital realm, you would incur a D to A conversion and another A to D conversion if you re-recorded it another digital recorder of the era. The VCR did not have either a coax or optical digital output.
The tapes could be copied as video tapes (in the analog realm) and an SP original could be copied in SP and played back OK, the machine didn't do LP, and SLP originals would play, but the copies were unplayable.
I made 6 hour mixtapes, on VHS in SLP from CDs. Worked well enough. My recorder doesn't work any more (machine won't load a tape anymore), I suspect all the digital stuff still works) however, the machine also recorded a simultaneous stereo VHS Hi-Fi track, and that is still playable on any stereo Hi-Fi VHS machine.
VHS Hi-Fi had great audio specs, BTW, way better than cassettes, and rivaling the digital PCM mode. Probably about as good as analog recording ever got. VHS Hi-Fi was also recorded onto the picture area of the videotape, but the Hi-Fi heads were physically skewed or offset from the video tracks, or used a frequency the video didn't use, or was recorded in a deeper layer of the tape, I can't recall precisely how it worked.
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