JPS63123280A - Digital special effect device - Google Patents

Abstract

PURPOSE:To attain the complete interlocking of a video signal and a key signal and to obtain special effect by processing the video signal and the key signal corresponding to the video signal with a digital special effect circuit. CONSTITUTION:A video signal and a key signal outputted from a super processor 1, a chroma key generator 2 and a waveform generating device 3 are inputted respectively to a video signal changing-over device 4 and a key signal changing-over device 5 and a corresponding video signal and a key signal are selected. A cancelling video signal is inputted to a digital video signal special effect circuit 6 and the size and position are converted by the control of a memory control circuit 7. On the other hand, the key signal is inputted to a digital key signal special effect circuit 8, the size and position of the key signal are converted by the same control as the video signal and the output is executed.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a digital special effects device that performs special effects such as reduction of a video signal in a television receiver, and in particular improves the interlocking part between the video signal and the key signal. Regarding digital special effects equipment.

[Prior Art] Conventionally, in this type of digital special effects apparatus, a video signal and a key signal have been linked with each other in a manner shown in FIG. 4 or FIG. 5 for a wipe waveform.

In Figure i4, a wipe waveform signal from a waveform generator 11 is converted into image start address and end address signals by an address detection circuit 12, and a digital special effects circuit 13 that performs special effects such as reduction is controlled.

In FIG. 5, size data and position data are sent from the control data generation circuit 14 to the digital special effects circuit 15 and the waveform generator 16, respectively, and control is performed so that the two coincide for each waveform.

[Problems to be Solved] In the case of the conventional digital special effects device described above, the resolution of the address detection circuit 12 is low in the case of FIG.
There is a noticeable jump in the movement when the position changes, and the method shown in FIG. 5 has drawbacks such as the need to match the size and position of each waveform.

In addition, for key signals other than wipe waveform signals (chromakey signals, super key signals, external key signals, etc.),
It was not possible to process the size and position of that key signal.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a digital special effects device that can completely link a video signal and a key signal and can perform special effects such as reduction on an arbitrary key signal.

[Means for solving the problem] The digital special effects device of the present invention, which solves the above conventional problems, includes a digital video signal special effects circuit that inputs a video signal and performs special effects such as reduction, and a key signal that is input. and a digital key signal special effect circuit for performing special effects such as reduction, and a memory for controlling the digital video signal special effect circuit and the digital key signal special effect circuit, respectively, and determining the size and position of the video signal and the key signal. The configuration includes a control circuit.

[Examples] Examples of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a digital special effects device according to an embodiment of the present invention.

The digital special effects device of the present invention inputs a video signal,
A digital video signal special effects circuit 6 that performs special effects such as reduction, a digital key signal special effects circuit 8 that inputs a key signal and performs special effects such as reduction, and these digital video signal special effects circuit 6 and the digital key signal. It is comprised of a memory control circuit 7 that controls the special effects circuit 8 and determines the magnitude and position of the video signal and key signal.

Next, the operation of the digital special effects device will be explained. That is, the video signals and key signals output from the super processor 1, chroma key generator 2, and waveform generator 3 are input to the video signal switch 4 and key signal switch 5, respectively, and the corresponding video signals and key signals are selected. be done.

Hereinafter, the case of the chromakey generator 2 will be described as an example with reference to FIG. 2. The canceled video signal (2) is inputted to the digital video signal special effects circuit 6, and its size and position are converted under the control of the memory control circuit 7 to obtain the output (2). On the other hand, the key signal ■ is input to the digital key signal special effect circuit 8, where the size and position of the key signal are converted under the same control as the video signal, and the output ■
is obtained. Here, digital key signal special effect circuit 8
has the same hardware configuration as the luminance signal processing channel in the digital video signal special effects circuit 6.

Furthermore, in the case of the waveform generator 3, it is necessary to cut off the waveform, so processing as shown in FIG. 3 is required. In the figure, the range from zero through ■ to ■ is the range in which the magnitude of the video signal changes due to the movement of the video signal. In this range, digital key signal special effect circuit 8
It also operates under the same control as the video signal processing from the memory control circuit 7. Therefore, in this range, the waveform generator 3 outputs a key signal of a fixed magnitude as shown by ■ in FIG.

The digital video signal special effects circuit 6 maintains the same size as the input video signal from (1) to (2) until the waveform is cut off. The digital key signal special effects circuit operates in a similar manner. On the other hand, in this range, the wipe waveform requires the screen to be cropped, so the output of the waveform generator 3 changes from ■ to ■ to the screen. The output of the digital key signal special effect circuit 8 receiving this output key signal also operates in a similar manner.

[Effects of the Invention] As explained above, in the digital special effects device of the present invention, the video signal and the corresponding key signal are processed by the digital special effects circuit, so that the video signal and the key signal are completely linked. In addition to super, chromakey, and wipe, special effects such as reduction can be applied to any key signal.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a digital special effects device according to an embodiment of the present invention, FIGS. 2 and 3 are diagrams for explaining the operation of the device shown in FIG. 1, and FIG. 4 and FIG. 5 are block diagrams showing the configurations of conventional digital special effects devices. 1 Nisper processor 2: Chroma key generator 3: Waveform generator 4: Video signal switch 5: Key signal switch 6: Digital video signal Special effects circuit 7: Memory control circuit

Claims (1)

[Claims] A digital video signal special effects circuit that inputs a video signal and performs special effects such as reduction; a digital key signal special effects circuit that inputs a key signal and performs special effects such as reduction; and the digital video signal special effects circuit. A digital special effect device comprising a memory control circuit that controls each of the digital key signal special effect circuits and determines the magnitude and position of the video signal and the key signal.