G - Physics – 11 – B
Patent
G - Physics
11
B
354/103
G11B 27/031 (2006.01) G11B 20/18 (2006.01)
Patent
CA 1174365
ABSTRACT A pulse code modulation signal processing circuit, for example, for an audio recording and reproducing apparatus to be used with a video tape recorder wherein errors occurring in the pulse code modulated signals are detected by serially providing incoming pulse code modulated data words to serially connected shift registers which are, respectively, adapted to store one word. The outputs of the first and third register are added and divided by two and this divided output is added with the inverted output of the second shift register and the results are compared with a reference signal to determine a one or zero. The one indicates that there is an error in one of the words and the zero indicates that there is no error. The ones or zeros from the comparing circuit are stored in three serially connected one bit shift registers which are timed with the data receiving shift registers and if a one occurs in any of the second shift registers an interpolation circuit is utilized to interpolate the output serial connected words from the first three shift registers. When the second shift register does not contain any ones, but contain only zeros, then it is known that the signals in the first three serially connected shift registers are correct.
383244
Gowling Lafleur Henderson Llp
Sony Corporation
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