摘要:
A one-piece type video camera comprises a device for taking the image of a subject, a device for collecting the voice and a device for magnetically recording the image and voice, all of which are built in the camera as one piece. The voice collecting device includes a microphone for collecting the voice incoming from the subject and another microphone for collecting the operator's voice. The operator's voice is subtracted from the voice incoming from the subject such that only the latter will be recorded. The operator's voice is utilized in the voice recognition technique so as to control the entire system of the video camera. In a preferred embodiment, the microphones are directional microphones.
摘要:
A one-piece type video camera comprises a device for taking the image of a subject, a device for collecting the voice and a device for magnetically recording the image and voice, all of which are built in the camera as one piece. The voice collecting device includes a microphone for collecting the voice incoming from the subject and another microphone for collecting the operator's voice. The operator's voice is subtracted from the voice incoming from the subject such that only the latter will be recorded. The operator's voice is utilized in the voice recognition technique so as to control the entire system of the video camera. In a preferred embodiment, the microphones are directional microphones.
摘要:
A one-piece type video camera comprises a device for taking the image of a subject, a device for collecting the voice and a device for magnetically recording the image and voice, all of which are built in the camera as one piece. The voice collecting device includes a microphone for collecting the voice incoming from the subject and another microphone for collecting the operator's voice. The operator's voice is subtracted from the voice incoming from the subject such that only the latter will be recorded. The operator's voice is utilized in the voice recognition technique so as to control the entire system of the video camera. In a preferred embodiment, the microphones are directional microphones.
摘要:
An automatic tracking control system for use in a magnetic recording and/or reproducing apparatus, which system includes a servo control circuit for controlling a tracking phase of a rotary head assembly; a search control circuit for causing the servo control circuit to vary the tracking phase in a predetermined quantity thereby to make a search so as to reciprocate within a predetermined tracking phase area; a detecting circuit for detecting envelope voltage values of an audio signal and a video signal reproduced for each search point and summing such signals together to provide a composite envelope value; and a reference tracking phase setting circuit for detecting the tracking phase, at which an optimum tracking can be attained when the reproduced signals are integrated from the composite envelope value, thereby to set a reference tracking phase which provides a reference value to the servo control circuit.
摘要:
A process for developing a latent image with a developer is provided which comprises(1) forming a layer of a developer comprising a magnetic toner containing magnetic powder having a BET specific surface area of 2 to 20 m.sup.2 /g on a member for supporting the developer,(2) bringing an electrophotographic photosensitive member holding the latent image into contact with said developer layer, said electrophotographic photosensitive member comprising an organic photoconductive material having a surface hardness more than 10 g,(3) forming a toner image on said electrophotographic photosensitive member,(4) transferring the toner image onto the transfer material, and(5) cleaning the electrophotographic photosensitive member having passed through the transferring step with a cleaning member. Said developer may alternatively comprises magnetic particles containing a binder and magnetic powder having a BET specific surface area of 2 to 20 m.sup.2 /g, and a non-magnetic or magnetic toner on a member for supporting the developer.
摘要:
A method for applying a toner comprising: forming, in a container containing a toner and magnetic particles for application of the toner, a magnetic brush of the magnetic particles; circulating the magnetic particles in the container; and forming a thin layer of the toner electrically charged on the toner carrying member; wherein the magnetic particles have a particle size distribution of 30 wt. % or more in the range of 150 to 200 mesh and 5 wt. % or less of under 250 mesh, and the weight ratio of the toner to the magnetic particles is from 5:95 to 50:50 in the region where the magnetic brush is formed.
摘要:
A toner for development comprises a crosslinked vinyl polymer having a gel content of 50-99% and a crosslinked vinyl polymer having a gel content of 10-0%.
摘要:
In a magnetic recording and reproducing apparatus, audio signals are recorded over a track where video signals have been recorded. The audio signals are subject to time base compression, and are recorded on a magnetic recording medium. The audio signals undergo time base expansion before they are reproduced. When recording television signals from a plurality of channels on one magnetic recording medium or reproducing video signals intermittently, the audio signals are recorded without interruption.
摘要:
A toner for developing electrostatic latent images with a good combination of fixability, anti-offset characteristic, anti-sticking characteristic and pulverizability contains a composition comprising a colorant or magnetic material and a binder resin. The binder resin has 0.1 to 60 wt. % of a chloroform-insoluble or a THF (tetrahydrofuran)-insoluble component and a THF-soluble component, the THF-soluble providing a molecular weight distribution in the chromatogram of GPC (gel permeation chromatography) thereof such that there is a main peak in the molecular weight range of 1,000 to 25,000 and a sub-peak or shoulder in the molecular weight range of 2,000 to 150,000. The binder resin may suitably be obtained through two polymerization steps including a solution polymerization step and a suspension polymerization step.
摘要:
An automatic tracking control system with a servo loop, controlled by a tracking control signal, that adjusts the position of a pickup head in relation to tracks scanned by the head. Adjacent-track crosstalk is extracted by a crosstalk detector and envelope-detected by a crosstalk envelope detector. An automatic tracking control circuit varies the tracking control signal, finds a state that minimizes the crosstalk envelope, and maintains the tracking control signal at or near that state.For double-deck recording systems in which one signal is recorded in surface tracks over another signal, the automatic tracking control circuit seeks a best compromise between minimizing the crosstalk envelope of one of the signals while maximizing the envelope of the other signal.