In recording mode, S-VHS machines require S-VHS videotapes, which has a different oxide media formulation for higher magnetic coercitivity. Nearly all S-VHS VCRs are backward compatible with VHS tapes. SVHS produces a 60% improvement in picture detail, or a horizontal resolution of 420 lines per picture height versus VHS's 240 lines. S-VHS also captures greater picture detail than even analog or cable broadcast TV, which is limited to about 330 lines.
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