JPH0530479A - Video signal processing device - Google Patents

Abstract

PURPOSE:To process a high definition television signal regardless of a low operation speed. CONSTITUTION:Resampling circuits 13 to 16 which distribute and input a luminance signal and color signals to plural systems, resample respective signals by 1/(the number of distributions of the fundamental sampling frequency of each input signal) and take out them in parallel, a picture processing part 17 which fetches in parallel signals of resampling circuits 13 to 16 and performs the picture processing, and time base multiplexing circuits 18 and 19 which multiplex signals processed in the picture processing part 17 in time division to restore the original sampling frequency are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal processing apparatus for processing a high definition television signal, for example.

[0002]

2. Description of the Related Art A high-definition television system has been developed as a next-generation television system. The high-definition television signal has a higher fundamental frequency than the television signal of the current system. Therefore, in order to process a high-definition television signal, a processing device that operates at high speed is required.

[0003]

The processing apparatus as described above requires a high level of technology, which affects the price. Further, there is also a problem that power consumption is large because high-speed operation is required.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a video signal processing apparatus capable of processing a high-definition television signal even if the operation speed is slow. .

[0005]

A video signal processing apparatus according to the present invention distributes and inputs each component component of a digital video signal into a plurality of systems, and divides the sampling frequency of the digital video signal by a fraction of one. Re-sampling means for re-sampling each component component, parallelizing and extracting the same, signal processing means for capturing each component component parallelized by the re-sampling means and performing specific signal processing, and further processing by the signal processing means It is provided with a multiplexing means for time-division-multiplexing each of the generated component components and returning to the original sampling frequency.

[0006]

According to the above means, since each component component of the video signal is resampled at a frequency lower than the sampling frequency of the video signal and parallelized, the individual components are image-processed relatively slowly. be able to.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a video signal processing device according to the present invention. A luminance signal and a color signal of a high quality television signal are input to the input terminals 11 and 12, respectively.

The high-definition television signal is a component signal modulated by the PCM (Pulse Code Modulation) method, and its format is shown in FIG. As shown in FIG. 2, the luminance signal is time-multiplexed with a Yc signal and a Yo signal, and the color signal is also time-multiplexed with a Pb signal and a Pr signal. The input luminance signal is
The input color signals are input to the resample circuits 13 and 14, and the input color signals are input to the resample circuits 15 and 16.

Resample circuits 13, 14, 15, 16
Respectively input data to 1 / n of the fundamental frequency (n = 2
Resampling is performed at a sampling frequency of × p, p = 1, 2, 3, ...

FIG. 3 shows the resampling circuits 13, 14, 1
The luminance signal and the chrominance signal after being resampled at 5 and 16 are shown. Here, a case is shown where re-sampling is performed at a sampling frequency that is ½ of the fundamental frequency.

As a result, the input luminance signal obtained by time-multiplexing the Yc signal and the Yo signal is separated and derived. Further, the input color signal in which the Pb signal and the Pr signal are time-axis-multiplexed is separated and derived. Y output in parallel from the resampling circuits 13, 14 and 15, 16.
The c signal, the Yo signal, the Pb signal, and the Pr signal are input to the image processing unit 17, respectively.

The image processing unit 17 performs processing such as image reduction and enlargement. The image-processed Yc signal, Yo signal, Pb signal, and Pr signal are input to time-axis multiplexing circuits 18 and 19, respectively.

The time axis multiplexing circuits 18 and 19 time-multiplex the Yc signal, Yo signal, Pb signal, and Pr signal input in parallel, respectively, and convert the original luminance signal and chrominance signal. The outputs of the time axis multiplexing circuits 18 and 19 are led to output terminals 20 and 21, respectively.

As described above, each component component is distributed to a plurality of systems, resampled at a fraction of the distribution frequency of the input signal, and specific signal processing is performed on each parallelized component component. ing. As a result, the operation clock of the device can be lowered, and the problem that power consumption increases with high-speed operation can be solved. Further, since a high-level technique due to high-speed operation is not required, the price problem is solved.

In the above embodiment, the case where the two systems of the luminance signal and the color difference signal multiplexed on the time axis are input has been described. However, the present invention is not limited to this, and the luminance signal, the two color difference signals, and the R, G, B signals may be three
The same processing can be performed when input is made in the system. Furthermore, parallelization of each component component is not limited to two systems.

[0016]

As described above, according to the video signal processing apparatus of the present invention, it is possible to process a high-definition television signal at a low operation speed.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a video signal processing device according to the present invention.

FIG. 2 is a diagram showing a format of a high definition television signal.

FIG. 3 is a timing diagram for explaining the operation of the device shown in FIG.

[Explanation of symbols]

11, 12 ... Input terminals, 13-16 ... Resample circuit,
Reference numeral 17 ... Image processing unit, 18, 19 ... Time axis multiplexing circuit, 2
0, 21 ... Output terminals.

Claims (2)

[Claims] 1. Re-sampling in which each component component of a digital video signal is distributed and input into a plurality of systems, and each component component is resampled at a fraction of the distribution frequency of the sampling frequency of the digital video signal and taken out in parallel. A video signal processing apparatus comprising: a means and a signal processing means for taking in each component component parallelized by the re-sampling means and performing a specific signal processing. 2. The multiplexer according to claim 1, further comprising a multiplexer that time-division multiplexes the component components processed by the signal processor and restores the original sampling frequency. Video signal processing device.