Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1982-03-11
1984-09-11
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
H04N 502
Patent
active
044713819
ABSTRACT:
A system for converting number of scanning lines converts a first number of scanning lines of a first digital video signal into a second number of scanning lines of a second digital video signal. The system comprises a discrete signal obtaining circuit supplied with the first digital video signal, for successively re-arranging a plurality of picture element information arranged along lines in a vertical direction with respect to a picture frame indicated by the first digital video signal within a time interval corresponding to the first number of scanning lines in units of each of the lines in the vertical direction in a time series manner, to obtain a discrete signal having a sampling frequency equal to a horizontal scanning frequency of the first digital video signal, a sampling frequency converter for converting the sampling frequency of the discrete signal obtained from the discrete signal obtaining circuit into a frequency equal to a horizontal scanning frequency of the second digital video signal, and a second video signal obtaining circuit for successively re-arranging an output of the sampling frequency converter in units of a plurality of picture element information along a direction of horizontal scanning lines in accordance with the second digital video signal in a time series manner, to obtain the second digital video signal using the second number of scanning lines.
REFERENCES:
patent: 3830971 (1974-08-01), van de Polder
patent: 3970776 (1976-07-01), Kinuhata et al.
patent: 4125862 (1978-11-01), Catano
patent: 4240101 (1980-12-01), Michael
The Royal Television Society Journal, London, vol. 15, No. 5, Sep.-Oct., 1974, pp. 140-142, 145-146, 149-150, 155, 156, 159.
International Broadcasting Convention, London, IEE, 23-27, Sep., 1974, pp. 104-113.
Kasuga Masao
Shibamoto Takeshi
Takahashi Nobuaki
Bernat Louis
Britton Howard W.
Victor Company of Japan , Limited
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