Digital high-definition video signal recording and reproducing a

Details Digital high-definition video signal recording and reproducing a Digital high-definition video signal recording and reproducing a

1992-11-03

1994-05-31

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Recording apparatus

360 8, 360 32, 348340, 348607, H04N 576, H04N 5782

Patent

active

053174135

ABSTRACT:
A high-definition signal (HD) is separated to prevent the quality of an image from being deteriorated when the high-definition signal is mixed with a standard video signal. A low band signal of the HD signal from a decimation circuit (5) is supplied through a discrete cosine transform circuit (7), a quantizer circuit (8), a variable length coder circuit (9) and an encoder circuit (11) to a recording head (12). A signal from the quantizer circuit (8) is supplied through an inverse quantizer circuit (17) to a subtracter circuit (18). A signal from the discrete cosine transform circuit (7) is supplied to the subtracter circuit (18), thereby forming a difference signal between a decoded signal of the compresses signal and the original signal. This difference signal is supplied through a quantizer circuit (19) a run length coding circuit (20) and a variable length coder circuit (21) to an adder circuit (16). A high band signal of the HD signal from the decimation circuit (6) is supplied through a quantizer circuit (13), a run length coder circuit (14) and a variable length coder circuit (15) to the adder circuit (16). Then, a signal from the adder circuit (16) is supplied through an encoder circuit 22 to a recording head 23.

REFERENCES:
patent: 4864396 (1989-09-01), Martens
patent: 4943855 (1990-07-01), Bheda et al.
patent: 5001561 (1991-03-01), Haskell et al.
patent: 5032925 (1991-07-01), Ganse et al.
patent: 5032927 (1991-07-01), Watanabe et al.

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