H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/1, 350/33
H04N 7/32 (2006.01)
Patent
CA 1250945
SYSTEM FOR DETECTING A TRANSMISSION ERROR ABSTRACT OF THE DISCLOSURE An inter-frame encoding/decoding equipment for television signals consists of inter-frame encoding equipment encoding a difference between television signals and the output of a frame memory and inter-frame decoding equipment which receives an encoded signal sent from the inter-frame encoding device via a transmission line, which decodes by adding the output of the frame memory to the encoded signal. The inter-frame encoding equipment is provided with a first operation circuit which operates the remainders obtained by dividing, by a predetermined value, the number of bits of logic "1" in the bit groups into which the output or the input of the frame memory is divided by a predetermined unit. The inter-frame decoding equipment is provided with a second operation circuit which operates the remainders obtaiend by dividing, by a predetermined value, the number of bits of logic "1" in the bit groups into which the output or the input of the frame memory is divided by a predetermined unit. The inter-frame decoding equipment is further provided with a comparator circuit which compares and checks the values operated by the first and the second operation circuits to detect a transmission error.
456693
Hiraoka Makoto
Kuroda Hideo
Matsuda Kiichi
Mukawa Naoki
Nishiwaki Mitsuo
Corporation Nec
Fujitsu Limited
Mcfadden Fincham
Nippon Telegraph & Telephone Corporation
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