Matsushita Electric Industrial Co., Ltd.

Victor Company of Japan, Limited

Namio Yamaguchi

Hidemi Henmi

Isao Kandaka

Takio Maeda

Keisuke Yamamoto

Yasuyuki Sato

Takayuki Sugahara

Seiji Higurashi

Takashi Kuriyama

Terumi Ohara

Mitsuo Isobe

Mitsuya Masuda

Toshihide Tanaka

Masaaki Fujita

Mikio Sasaki

Tetsuo Kutsuki

Takjo Maeda

Teruo Goto

Tsuyoshi Akiyoshi

Pictures are captured, and thereby moving-picture data is generated which represents a sequence of moving-picture fields. At least one picture is captured, and thereby still-picture data is generated which represents at least one still-picture frame corresponding in picture capture timing to one of the moving-picture fields represented by the moving-picture data. Components which correspond to said one of the moving-picture fields are removed from the still-picture data to generate supplementary still-picture information. Link information is generated which represents the picture capture timing correspondence between the still-picture frame and said one of the moving-picture fields. The moving-picture data, the supplementary still-picture information, and the link information are recorded on a recording medium.

Information recording apparatus, information reproducing apparatus, and related computer programs

A data broadcast receiving apparatus used in a system is combined with another transmission line such as telephone circuit. By receiving a television broadcast having a data broadcast signal, such as a teletext signal, superposed on the television broadcast signal, in which a first auxiliary information signal contained in the data broadcast signal and a second auxiliary information signal from the other transmission line are extracted, a control procedure is created responsive to the first and second auxiliary information signals, and the data broadcast signal and main information from the other transmission line are processed responsive to the control procedure.

Apparatus for receiving and decoding a broadcast signal

Data broadcast receiving apparatus receiving a television broadcast

Major adjustments of an equipment such as a television receiver are attained by remote control signals from a remote control signal transmitter provided for the equipment. A memory for storing control data for a signal processing circuit, a control circuit for controlling the signal processing circuit and the memory, and a switching circuit for setting the control circuit in a first mode or a second mode are provided. In the first mode, the signal processing circuit is controlled by the remote control signal, and in the second mode, the signal processing circuit is controlled by the same remote control signal and the resulting control data is written into the memory.

Control unit including a circuit for controlling and setting control

In a synchronous video detector circuit using a phase-locked loop, the synchronous detection of a video IF signal is effected with a synchronous carrier signal reproduced by the PLL including a voltage-controlled oscillator. Each of a phase comparator of the PLL and a synchronous video detector has its input terminal connected to an output terminal of a video IF amplifier by untuned coupling, and arranged on the output side of the synchronous video detector is a phase-locked mode detector for detecting that the PLL is in its phase-locked mode. The phase-locked mode detector is adapted to control the band width of a low-pass filter of the PLL in either a narrow band mode or a wide band mode and the low-pass filter is controlled to operate in the narrow band mode only when the PLL is in the phase-locked mode of operation. The black and white noise included in the output signal of the synchronous video detector are both cancelled by a noise cancellation circuit including a black noise detector for pulse noise cancellation purposes.

Synchronous video detector circuit using phase-locked loop

An automatic local oscillation frequency control apparatus for a television receiver is disclosed, wherein a video intermediate frequency (VIF) signal is applied to an FM discriminator for generating an AFC voltage through a phase shifter comprised of a serial-parallel resonance circuit, and one of the serial resonance frequency and the parallel resonance frequency of the serial-parallel resonance circuit is selected to be a frequency near a picture carrier frequency while the other is selected to be a frequency which is made by subtracting one half of a differential frequency between the picture carrier frequency and a sound carrier frequency from the picture carrier frequency. The present apparatus can attain an automatic frequency control having a wide pull-in range and a wide hold range.

Automatic frequency control apparatus for television receiver

Apparatus for demodulating color difference signals from a chroma signal in a color television receiver set includes first and second differential amplifiers and a matrix circuit comprising a constant current circuit. Output terminals of the differential amplifiers and the matrix circuit are connected to a power supply through load resistors of the same resistance, respectively, through which D.C. currents of the same magnitude are passed. Resistors for combining signals are connected to the load resistors, and a common chroma signal is applied to the first and second differential amplifiers while sub-carriers of different phase are applied to the first and second differential amplifiers to effect synchronous detection to demodulate color difference signals of different demodulation axes across the load resistor. With this arrangement, a plurality of stable color difference signals of uniform D.C. level can be produced and the number of terminal pins required can be reduced so that the demodulation apparatus is readily implemented in an integrated circuit structure.

Color demodulation apparatus

A color signal processing apparatus, particularly a circuit for generating a color sub-carrier wave for demodulation, used in a color television receiver set to demodulate a carrier color signal to reproduce a color image, is disclosed. The apparatus comprises an oscillation circuit including four differential amplifiers to synthesize oscillation signals having phases which differ 90.degree. from each other to produce a color subcarrier wave, a color-phase adjusting circuit for changing phases of the oscillation signals from the oscillation circuit by changing bias voltages of the differential amplifiers, and a phase detection circuit for comparing the phases of the oscillation signals having the phases changed by the color phase adjusting circuit with a phase of a color burst signal to change the bias voltages of the differential amplifiers in the oscillation circuit depending on the comparison.

Color subcarrier generator

Disclosed is a device for eliminating the ghost wherein at least two antenna bays are spaced apart in the horizontal direction by 1/4 wavelength, a mixer is provided which mixes the outputs from the antenna bays, phase shifting means for shifting the ghost signal in phase with or out of phase by 180.degree. with the desired signal is inserted between the output terminal of one antenna bay and an input terminal of the mixer, amplitude control means is inserted between the output terminal of the other antenna bay and an input terminal of the mixer, and the output from the mixer is delayed and the delayed output and the undelayed output from the mixer are mixed so as to control their amplitudes and polarities, whereby the ghost signal may be cancelled.

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Hirakata, Japan

Namio Yamaguchi