摘要:
A special effect generating system processes first, second, and third video signals supplied respectively from first, second, and third video signal sources to produce an output video signal with special effects. At a plurality of points of time along a first time base, first control data indicative of positions of edges of a first image represented by the first video signal are generated and stored in a first memory. At a plurality of points of time along a second time base, second control data indicative of positions of a boundary between second and third images represented by the second and third video signals are generated and stored in a second memory. The first, second, and third video signals are combined into the output video signal based on the first and second control data stored in the first and second memories.
摘要:
An editing apparatus for editing digital video signals employs a number of video recording and/or reproduction devices, a signal processing mechanism, and a switching mechanism, wherein the number of transfer lines and the area occupied by the associated connectors is decreased by converting parallel signals into serial format.
摘要:
A digital switcher of this invention comprises a matrix switcher section 11 adapted so that a plurality of serial digital video signals are inputted through respective input buses, a control section 12 for carrying out operation control of the matrix switcher section 11, signal processing sections 13A, 13B . . . connected to a plurality of output buses of the matrix switcher section 11, an input detector 14 connected to one output bus of the matrix switcher section 11, and an error detector 15 connected to one output bus of the matrix switcher section 11. An approach is employed to control the matrix switcher section 11 by the control section 12 with respect to a plurality of digital video signals inputted through respective input buses to thereby selectively detect presence or absence of input and occurrence of error by the input detector 14 and the error detector 15 connected to one output bus of the matrix switcher section 11.
摘要:
A digital video audio processing apparatus in which serial signal formed digital video signals and digital audio signals, which are supplied to a plurality of input terminals and are multiplexed each other, are converted into parallel signal form respectively; the digital video signals and digital audio signals are separated respectively; switching processing or video special effect processing is performed on a plurality of digital video signals; switching processing or mixing processing is performed on a plurality of digital audio signals; and these processed digital video signals and digital audio signals are multiplexed each other to convert into serial signal form and output them.
摘要:
A write clock generator for a time base corrector incorporated in a video tape recorder can generate a write clock signal including accurate phase and frequency fluctuation information on a reproduced video signal in spite of a simple circuit configuration. A write clock signal is generated from a VCO oscillated in response to a reproduced burst signal, and further the VCO is so controlled on the basis of frequency difference between the oscillated write clock signal and a frequency fluctuation signal such that the frequency difference may be eliminated. The frequency fluctuation signal is generated in response to a horizontal synchronizing signal so as to include time base fluctuations in a reproduced video signal.
摘要:
A digital chrominance signal processing system for processing an input digital composite chrominance signal, which is sampled with a sampling frequency f.sub.s =2mf.sub.sc, wherein m is an integer and f.sub.sc is a color subcarrier frequency, has a decoder for decoding the input digital composite chrominance signal into digital chrominance components, the decoder including a code converter for inverting the input digital composite chrominance signal and a switch for selectively switching between the input digital composite chrominance signal and an output of the code converter at a switching rate mf.sub.sc.
摘要:
Disclosed herein is an analog television broadcast signal receiving apparatus including: a tuner section configured to convert an analog television broadcast signal into a predetermined intermediate frequency band signal; a demodulation circuit section configured to obtain a picture output signal and a sound intermediate frequency signal from the predetermined intermediate frequency band signal coming from the tuner section; a picture processing circuit section configured to convert the picture output signal into a display-ready picture signal; a sound demodulation processing circuit section configured to demodulate the sound intermediate frequency signal; and a control section.
摘要:
A key signal processing apparatus for video signal processing including a signal delay circuit for successively delaying by 1 clock units a key input signal, used for applying a special effect to a video signal, and outputting the delayed key signal; a signal selection circuit for receiving the key input signal and a plurality of delayed key signals output from the signal delay circuit and selecting based on a selection control signal two pairs of signals in predetermined relationships of delay; a first signal interpolation circuit for performing signal interpolation on the first pair output from the signal selection circuit using a first coefficient; a second signal interpolation circuit for performing signal interpolation on the second pair output from the signal selection circuit using a second coefficient; and a signal synthesization circuit for combining a signal from the output of the first signal interpolation circuit and the output of the second signal interpolation circuit and outputting it as a key signal for video signal processing.
摘要:
A digital switcher of this invention comprises a matrix switcher section 11 adapted so that a plurality of serial digital video signals are inputted through respective input buses, a control section 12 for carrying out operation control of the matrix switcher section 11, signal processing sections 13A, 13B . . . connected to a plurality of output buses of the matrix switcher section 11, an input detector 14 connected to one output bus of the matrix switcher section 11, and an error detector 15 connected to one output bus of the matrix switcher section 11. An approach is employed to control the matrix switcher section 11 by the control section 12 with respect to a plurality of digital video signals inputted through respective input buses to thereby selectively detect presence or absence of input and occurrence of error by the input detector 14 and the error detector 15 connected to one output bus of the matrix switcher section 11.
摘要:
There is an apparatus for generating a velocity error signal for use in a time base corrector. This apparatus comprises: an A/D converter that converts a velocity error to a digital signal that is fed to a summing circuit to convert it to a phase shift amount. A zero value interpolation circuit multiplies the sampling frequency of the phase shift amount with an integer and a digital low-pass filter interpolates an output signal of the interpolation circuit. A differentiating circuit to convert an interpolated phase shift amount of an output signal of the LPF to a phase difference and a D/A converter 9 converts the digital phase difference data to an analog signal. With this apparatus, the velocity error can be accurately corrected.