Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1991-08-15
1992-09-01
Kostak, Victor R.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
H04N 713
Patent
active
051444283
ABSTRACT:
A method and an apparatus for decoding image signals capable of achieving a reproduction of the image signals with a high image quality by using a relatively low speed inverse orthogonal transform device. In the apparatus, interframe difference information is integrated by using the orthogonal transform coefficients for the interframe differential signals recovered from the input encoded signals in order to reproduce the image signals, which is carried out in one of two processing modes including: a first processing mode for applying an inverse orthogonal transform to the orthogonal transform coefficients in order to recover the interframe differential signals, and then integrating the interframe difference information by using the recovered interframe differential signals on a pel domain defined in terms of picture elements, in a case where a number of input blocks per unit time in the input encoded signals is less than a prescribed threshold value; and a second processing mode for integrating the interframe difference information by using the orthogonal transform coefficients on a transformed domain defined in terms of the orthogonal transform coefficients, in a case where the number of input blocks per unit time in the input encoded signals is not less than a prescribed threshold value.
REFERENCES:
patent: 4792851 (1988-12-01), Mochizuki
NTT Human Interface Laboratories, pp. 7-12, Mar. 1990, Hidenori Okuda, et al., "A Decoding Scheme for Multiple Video Signals" D-262.
ITEJ Technical Report, vol. 14, No. 35, pp. 11-16, ICS`90-45, AIPS` 90-37, Jun. 28, 1990, Hidenori Okuda, et al., "A Decoding Scheme for Multiple Pictures".
NTT Human Interface Laboratories, pp. 6-238, Sep. 1990, Hidenori Okuda, et al., D-236, "A Decoding Scheme Based on CIM".
NTT Human Interface Laboratories, Jun. 23, 1991, pp. 1-5, Hidenori Okuda, et al., "A Concurrent Decoding Scheme for Multiple Motion Videos".
Masaki Shigeki
Okuda Hidenori
Kostak Victor R.
Nippon Telegraph and Telephone Corporation
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