| 摘要 |
A television sound signal processing apparatus receives a digitized delta-encoded sound signal superposed in a horizontal blanking period and a digital signal showing the standard value of the sound signal superposed in a vertical blanking period, and then compares the reference signal of this field with that of one field before, and, when the difference is greater than a predetermined value, employs the decoded value of the delta encoded signal immediately before that reference signal as the standard value for the delta decoding of the sound signal.
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