Victor Company of Japan, Limited

Yutaka Ichinoi

Naomichi Nishimoto

Akira Hirota

Yoshihiko Ota

Masahiko Turuta

Yukinobu Ishigaki

Noboru Watanabe

Hidehiro Katoh

Mitsuhiro Yoshida

Hiroshi Asai

Yutaka Tanaka

Hiroyuki Takeishi

Yutaka Isobe

A shake sensor outputs an analog shake detection signal representative of a shake of a camera body. An amplifier operates for amplifying the analog shake detection signal to generate an analog amplification-resultant signal. The analog shake detection signal and the analog amplification-resultant signal are converted into a digital shake detection signal and a first digital amplification-resultant signal, respectively. A signal value represented by the digital shake detection signal is amplified on a digital basis to generate a second digital amplification-resultant signal. A decision is made as to whether or not the signal value represented by the first digital amplification-resultant signal remains greater than a predetermined reference value during at least a prescribed time interval. One is selected from the first and second digital amplification-resultant signals in response to the result of the decision. A shake corrective signal is generated in response to the selected signal.

Video camera with anti-shake system

An apparatus for processing a speech signal includes a receiver, a speech signal decoder, a speech rate conversion information detector, and a speech rate converting processor. The receiver receives multiplexed signal of information concerning controls and programs, including speech packets through a transmission line. The decoder decodes the speech signal of packets out of the received signals. The detector detects speech rate conversion execution information in the received signals. The processor subjects the decoded speech signal to a speech rate conversion process if the speech rate conversion execution information indicates that the speech signal has not been subjected to the speech rate conversion process on the transmitting end, and which does not subject the decoded speech signal to the speech rate conversion process if the speech rate conversion execution information indicates that the speech signal has been subjected to the speech rate conversion process on the transmitting end.

Apparatuses for adaptively controlling processing of speech signal and adaptively communicating speech in accordance with conditions of transmitting apparatus side and radio wave and methods thereof

A data signal recording and playback method and system that can determine whether the recording medium being used is a high-performance recording medium for recording and playing back both digital and analog signals, or a standard-performance medium, and selecting its recording specifications accordingly. When recording/playing back digital data signals and analog data signals received as inputs to the system, if a high-performance magnetic tape is identified, the system selects for recording, one of the three input signals: a digital data signal, an analog data signal obtained through D/A conversion of a digital data signal, or an analog data signal input as such. If the recording medium being used is a standard-performance magnetic tape, the system selects for recording, either an analog data signal obtained through D/A conversion of a digital data signal, or an analog data signal input as such.

Data signal recording and/or reproducing method and system operable with analog and/or digital data signals

A signal reproducing apparatus operates on a magnetic tape on which information is recorded according to one of first, second, and third predetermined recording formats. The signal reproducing apparatus includes first and second heads. The first head reproduces a signal from the magnetic tape, and has a first predetermined azimuth angle. The second head reproduces a signal from the magnetic tape, and has a second predetermined azimuth angle different from the first predetermined azimuth angle. A first detector detects a level of the signal reproduced by the first head. First components are separated from the signal reproduced by the second head. The first components have frequencies in a first predetermined band. A second detector detects a level of the first components. Second components are separated from the signal reproduced by the second head. The second components have frequencies in a second predetermined band separate from the first predetermined band. A third detector detects a level of the second components. A decision is made as to which of the first, second, and third predetermined recording formats the signals reproduced by the first and second heads correspond to in response to the levels detected by the first, second, and third detectors.

Apparatus for reproducing a signal from a magnetic recording medium

A frequency converting circuit has a phase divider, a switching circuit, and switching pulse generator. The phase divider divides a phase of a first input signal and outputting m-units of channel signals having a same frequency but different phases shifted 2.pi./m by 2.pi./m radian respectively, where m is a three or more natural number except 2.sup.n (n: a natural number). The m-units of the channel signals are switched by the switching circuit to output switched channel signals. In response to a second input signal having a frequency higher than that of the first input signal, the switching pulse generator generates switching pulse signals, and switches and outputs the m-units of channel signals having different phases shifted 2.pi./m by 2.pi./m radian for each constant period, by controlling the switching circuit based on the switching pulse signals. The switched channel signals are synthesized to output a signal having a frequency difference between the first input signal and the switching pulse signals or a frequency addition of the first input signal and the switching pulse signals.

Frequency converting circuit

Whether or not a luminance signal or an HD input signal is input to a picture signal recording apparatus is detected, and a recording mode is determined according to the detection of the luminance signal in a recording mode determining unit. In cases where the luminance signal is detected, first and second color difference signals of the HD input signal are alternately deleted on every scanning line. Thereafter, the luminance signal pertaining to odd-numbered scanning lines and the first color difference signal are time-compressed and multiplexed on every scanning line, and the luminance signal pertaining to even-numbered scanning lines and the second color difference signal are time-compressed and multiplexed on every scanning line. In contrast, in cases where the luminance signal is not detected, a luminance signal and first and second color difference signals of a normal picture signal input to the apparatus are time-compressed and multiplexed on every scanning line. Thereafter, the signals multiplexed are recorded on a magnetic tape according to the recording mode. Therefore, even though the number of scanning lines in the HD input signal is higher than that in the normal picture signal, the first and second color signals can be recorded within a limited frequency band.

Picture signal recording/reproducing method and apparatus for

A level standard signal including a level reference signal and an information signal is interposed in a particular horizontal scanning line (a 603-line) of an HD picture signal. An amplitude level of the HD picture signal is corrected according to the level reference signal in a level correcting section, and an input level of the level standard signal is changed to a recording level according to the level reference signal in a recording level standard signal generating section to generate a recording level standard signal. Also, peripheral horizontal scanning lines of the HD picture signal placed at peripheral portions of an image plane are deleted in a signal dividing section, and a TCI signal is generated. The recording level standard signal is interposed in the TCI signal to generate a composite signal, and the composite signal is recorded in a magnetic tape. The composite signal is reproduced and changed to another HD signal in which an output level standard signal including an output level reference signal and an output information signal are interposed in the particular horizontal scanning line.

High-definition picture signal recording/reproducing apparatus for

An apparatus for producing a frequency-multiplex signal on the basis of a plurality of signals so as to record the produced frequency-multiplex signal on a recording medium, second signal having a frequency lower than that of the first signal. The apparatus includes a multiplying circuit for multiplying the frequency of the second signal by 2 and an amplitude-modulator for multiplying the first signal by the output signal of the multiplying circuit. Also included in the apparatus is an adder for adding the second signal to the output signal of the amplitude-modulator, the output signal of the adder being recorded as the frequency-multiplexing signal on the recording medium.

Recording of frequency-multiplex signal on recording medium

A carrier chrominance signal processing circuit comprises first through fourth circuits. The first circuit detects an edge of color in an input carrier chrominance signal. The second circuit holds color information on the carrier chrominance signal in a vicinity of the edge of color. The third circuit produces a control signal having a predeterined pulse width in response to the detected edge of color. The fourth circuit selects a held color information when the control signal is produced, and selects the carrier chrominance signal when no control signal is produced, so that a steepened carrier chrominance signal is outputted from the fourth circuit.

Carrier chrominance signal processing circuit

A video signal reproducing apparatus comprises a main head and an auxiliary head for simultaneously reproducing from a recording medium two video signals having a mutual time difference of approximately one field, and a circuit for performing a re-sampling and/or a conversion for displaying the reproduced video signal as a progressively scanned frame of picture based on the two reproduced video signals.

Video signal reproducing apparatus

To suppress noise included in a video signal, the noise level is detected by a noise level detecting circuit which operates only within blanking period; and the noise level is suppressed through control of a gain control circuit in accordance with an output signal from the noise level detecting circuit. The gain control circuit may be a voltage controlled variable gain amplifier interposed between a limiter and a subtractor of an in-line noise supressing circuit. A vertical correlation noise canceller may also be combined so that a gain control circuit interposed between a limiter and a subtractor is also controlled.

Noise suppressing circuit with gain control

A video signal reproducing apparatus for reproducing a recorded video signal from a magnetic recording medium comprises a reproducing circuit for reproducing a recorded frequency division multiplexed signal of an angle modulated luminance signal and a frequency converted carrier chrominance signal which has been frequency-converted into a low frequency band, a demodulating circuit for obtaining a reproduced luminance signal, a filter circuit for filtering a specific frequency component within the reproduced luminance signal, a level detecting circuit for detecting an output signal level of the filter circuit, a frequency converter circuit for obtaining a reproduced carrier chrominance signal, and a level controlling circuit for controlling the level of the reproduced carrier chrominance signal based on an output detection signal of the level detecting circuit.

Video signal reproducing apparatus for reproducing recorded video signal

A color video signal recording and reproducing apparatus comprises a first circuit for generating a low-frequency luminance signal, a second circuit for forming a time base compressed line-sequential color difference signal, a circuit for generating a time-division-multiplexed signal in which the output signals of the first and second circuits are multiplexed in time-sequence, a modulator for frequency-modulating a carrier by the time-division-multiplexed signal, a first converter for generating a low-band converted high-frequency luminance signal, a circuit for recording a frequency-division-multiplexed signal of at least the output signals of the modulator and the first converter on a recording medium and reproducing the same from the recording medium, a second converter for obtaining a reproduced high-frequency luminance signal from the reproduced signal, a circuit for obtaining a reproduced luminance signal from the reproduced high-frequency luminance signal and a reproduced low-frequency luminance signal obtained from the reproduced signal, and a circuit for obtaining a reproduced color video signal by mixing a reproduced carrier chrominance signal which is obtained from the time base compressed line-sequential color difference signal and the reproduced luminance signal.

Color video signal recording and reproducing apparatus

A color video signal transmitting apparatus comprises first and second input terminals supplied in parallel with a time base compressed luminance signal and a first time base compressed line-sequential color difference signal which are obtained from one or a plurality of pickup elements of a television camera by changing an effective horizontal scanning period of the one or a plurality of pickup elements to a predetermined short period, a circuit for producing a second time base compressed line-sequential color difference signal by time base compressing the signal from the second input terminal, a circuit for obtaining a multiplexed signal of a second synchronizing signal having a predetermined width and being in phase with a first synchronizing signal from a third input terminal and a discriminating signal of every two regular horizontal scanning periods which is used to discriminate either one of two kinds of time base compressed color difference signals which make up the second time base compressed line-sequential color difference signal, to produce a multiplexed signal in which the second synchronizing signal and the discriminating signal are multiplexed, a circuit for obtaining a time-division-multiplexed signal by time-division-multiplexing the time base compressed color difference signals, the time base compressed luminance signal, and the multiplexed signal, and a circuit for transmitting the time-division-multiplexed signal to a transmitting path.

Color video signal transmitting apparatus

A noise reduction circuit for a video signal comprises a plurality of circuit parts coupled in series and a control circuit. Each of the circuit parts comprises a delay circuit for delaying an input video signal supplied thereto, a first subtracting circuit for subtracting an output signal of the delay circuit from the input video signal, a limiter circuit for limiting the amplitude of an output signal of the first subtracting circuit, and a second subtracting circuit for subtracting an output signal of the limiter circuit from the input video signal and for producing a signal which is reduced of a noise component within the input video signal. The delay circuit in each of the circuit parts has a different delay time in accordance with a kind of correlation existing in information contents of the input video signal. The control circuit comprises a plurality of detecting circuits provided in correspondence with the circuit parts and a control signal supplying circuit. Each of the detecting circuits is supplied with the output signal of the first subtracting circuit of a corresponding circuit part and detects large amplitude signal components thereof.

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Yokohama, Japan

Yutaka Ichinoi