EP0282279A2
Expired / Lapsed
EP
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Apparatus for compressing and/or expanding time base
Assignee: Sony Corp
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Filing: 1988-03-09
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Granted: —
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Expires: 2008-03-09
Abstract
Abstract An apparatus for compressing and/or expanding time base using a CCD (22) adapted such that an input signal supplied to the CCD (22) is obtained as a signal with its time base compressed or expanded on the output side of the CCD (22), a first two-phase transfer clock pulse signal made up of first and second pulse train signals (Pʹø1, Pʹø2) having a first period and arranged to be 180° out of phase with each other is used for driving the CCD thereby to write the input signal to the CCD and a second two-phase transfer clock pulse signal made up of third and fourth pulse train signals (Qʹø1, Qʹø2) having a second period and arranged to be 180° out of phase with each other is used for driving the CCD thereby to read from the CCD a signal which is produced from the input signal with its time base compressed or expanded, in which the pulse width of the first pulse train signal (Pʹø1) is made virtually equal to the pulse width of the third pulse train signal (Qʹø1) and the pulse width is selected to be smaller than a half of the smaller one of the first period and the second period.
Inventors
- 👤 Kaoru Urata
- 👤 Miaki Nakashio
- 👤 Koichi Ono
- 👤 Hitoshi Hirai
- 👤 Masayuki Iwamoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 09:59
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/92; G; G11; G11C; G11C19/00; G11C19/28; G11C19/282; G11C19/285; G11C27/00; G11C27/04; H04N5/14; H04N9/00; H04N9/79
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
263 words
Apparatus for compressing and/or expanding the time base of an input signal, characterised in that it comprises: charge coupled device means (22) having an input terminal (21) which in use supplied with said input signal, an output terminal, first and second clock terminals, and a charge transfer channel (13) through which charges corresponding to said input signal is transferred, said charge transfer channel (13) having bend portions (13A) at which the direction of the charge transfer is changed, clock generating means (24) for generating a write clock signal (P) and a read clock signal (Q) in a time-divisional manner, the frequency of said read clock signal (Q) being different from that of said write clock signal (P), and clock driver means (25) selectively supplied with one of said write (P) and read (Q) clock signals for generating first and second pulse trains (Pʹø1, Pʹø2) to be supplied to said first and second clock terminals, respectively, when said write clock signal (P) is supplied and generating third and fourth pulse trains (Qʹø1, Qʹø2) to be supplied to said first and second terminals, respectively, when said read clock (Q) signal is supplied, said first pulse train (Pʹø1) being 180° out of phase with said second pulse train (Pʹø2) and said third pulse train (Qʹø1) being 180° out of phase with said fourth pulse train (Qʹø2), the pulse width of said first pulse train (Pʹø1) being substantially equal to that of said third pulse train (Qʹø1) and being smaller than half of the shorter one of said write clock period (Tw) and read clock period (Tr).
Claim 2
Dependent Claim
263 words
Apparatus for compressing and/or expanding the time base of an input signal, characterised in that it comprises: charge coupled device means (22) having an input terminal (21) which in use supplied with said input signal, an output terminal, first and second clock terminals, and a charge transfer channel (13) through which charges corresponding to said input signal is transferred, said charge transfer channel (13) having bend portions (13A) at which the direction of the charge transfer is changed, clock generating means (24) for generating a write clock signal (P) and a read clock signal (Q) in a time-divisional manner, the frequency of said read clock signal (Q) being different from that of said write clock signal (P), and clock driver means (25) selectively supplied with one of said write (P) and read (Q) clock signals for generating first and second pulse trains (Pʹø1, Pʹø2) to be supplied to said first and second clock terminals, respectively, when said write clock signal (P) is supplied and generating third and fourth pulse trains (Qʹø1, Qʹø2) to be supplied to said first and second terminals, respectively, when said read clock (Q) signal is supplied, said first pulse train (Pʹø1) being 180° out of phase with said second pulse train (Pʹø2) and said third pulse train (Qʹø1) being 180° out of phase with said fourth pulse train (Qʹø2), the pulse width of said first pulse train (Pʹø1) being substantially equal to that of said third pulse train (Qʹø1) and being smaller than half of the shorter one of said write clock period (Tw) and read clock period (Tr).
Claim 3
Dependent Claim
33 words
Apparatus for compressing and/or expanding the time base of an input signal according to claim 1, wherein the duty cycles of said write clock signal (P) and read clock signal (Q) are 50%.
Claim 4
Dependent Claim
116 words
Apparatus for compressing and/or expanding the time base of an input signal according to claim 1 or 2, wherein said clock driver means (25) includes a D-type flip-flop (31) having a data input terminal (D) connected to a first reference voltage source (+B), first and second output terminals (Q, Q) one of which is connected to a second reference voltage source through a series circuit of a resistor (32) and a capacitor (33), said resistor (32) being shunted by a diode (34), a reset terminal (R) connected to the junction of said resistor (32) and capacitor (33), and a clock terminal (31) which, in use, is supplied with the output of said clock generating means (23).
Claim 5
Dependent Claim
50 words
Apparatus for compressing and/or expanding the time base of an input signal according to any one of the preceeding claims, wherein the frequency of said write clock signal (P) is lower than the frequency of said read clock signal (Q) whereby the time base of said input signal is compressed.
Claim 6
Dependent Claim
49 words
Apparatus for compressing and/or expanding the time base of an input signal according to claim 1, 2 or 3, wherein the frequency of said write clock signal (P) is higher than the frequency of said read clock signal (Q) whereby the time base of said input signal is expanded.
Claim 7
Dependent Claim
109 words
Apparatus according to any one of the preceding claims, for time base comprises a pair of chrominance of colour difference signals of a video signal, wherein a pair of such charge coupled devices are provided for each such signal, the devices (102, 104) associated with one of the signals having storage capacity for a time segment of the video signal twice that of the other pair of devices (101, 103), the respective signals being applied to the associated pair of devices and the outputs of the respective devices being sampled such that a single output signal containing the two chrominance or colour difference signals in time-interleaved relationship is obtained.
Claim 8
Dependent Claim
24 words
Apparatus according to claim 6, further comprising charge coupled device means adapted to de-interleave and time-base expand the signals contained in said output signals.
References Cited (Backward Citations)
No citation records indexed.
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