JPS60170394A - Processing system of television signal - Google Patents

Abstract

PURPOSE:To transmit highly precise television information in the horizontal direction with simple constitution by modulating and multiplexing highly precise information in a position conjugating with a chrominance signal and the low area of a horizontal frequency in the same position when a signal component of an NTSC system is expressed in a time-vertical frequency area. CONSTITUTION:A component of 4.4-8.4MHz denoted by an YH1 is transferred to a part shown by an YH1' of the 1st and the 3rd quadrants in a time-frequency (f-V) area of a system in which highly precise information is stored. The components of YH2 (8.4-10.44MHz) are transferred to the frequency area below the C component YH2' which is shown in the 2nd and 4th quadrants. An YH2' and a C component are multiplexed in a section I and a section II of two quadrants, respectively. By untilizing the frequency area for highly precise information, highly precise television information is transmitted in the horizontal direction.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a television signal processing system, and in particular to a television signal processing system that is fully compatible with the current NTSC system and transmits a wideband image signal in a narrow frequency band. , relates to a signal processing method for demodulating wideband images.

[Background of the invention]

As a high-definition television system that is fully compatible with the conventional NTSC television system, IEICE technical report C383-61r "Proposal of a high-definition TV system that is fully compatible with the NTSC television system" (published on July 29, 1982) ).

One of the above methods converts the high-frequency component YH (high-definition information) of the luminance signal into (C
), the frequency is converted and multiplexed with the lower harmonic component of the luminance signal (the luminance signal of the current television signal) and transmitted.

Another one of the above methods is a second
A high-definition signal is frequency-shifted and inserted at the location indicated by Yu' in the figure. That is, the relationship between the temporal frequency f and the vertical frequency ν is such that the high-definition signal YH is converted to YH and inserted into the low frequency part of the horizontal frequency μ at the same location as the color signal.

[Purpose of the invention]

It is an object of the present invention to further develop the aforementioned method and to
In the SC television system, we find a frequency band that is not very effectively used, and insert high-definition information (high-frequency components of the brightness signal) into it.

Then, on the receiving side, this is returned to its original state and received and reproduced as a high-definition image. At this time, the insertion prevents the image quality from deteriorating when the image is received by an existing receiver.

[Summary of the invention]

In order to achieve the above objectives, the signal component of the NTSC television signal is conjugated with the color signal component when expressed in the time-vertical frequency domain, and high-definition information is modulated and multiplexed in the low horizontal frequency region of the same region. It was designed to make it easier to understand.

, [Embodiments of the Invention] The configuration will be described below with reference to the embodiment shown in FIG. This example shows the case where the most amount of information is packed.

In the figure, in the time-vertical frequency (f-ν) domain, first, in the parts indicated as Y old' in the first and third chapters,
Transfer the 4,4 MHz to 8.4 MHz component marked as Y H1. For this purpose, a well-known frequency shifting technique can be used in a manner similar to the conventional method.

Also, the second. For Chapter 4, YB2 (8,4MHz-1
0.4MHz) component in the frequency region YH below the C component.
Move to 2. That is, in these two chapters, the YB2 component is multiplexed in the section I, and the C component is multiplexed in the section ■.

Processing to return these frequency-shifted signals to their original state, especially spatio-temporal filters, etc., are already known and will therefore be omitted.

〔Effect of the invention〕

According to the present invention, by analogy with the conventional first and second methods, it is possible to send high-definition TV information in the horizontal direction by using more frequency regions for high-definition information.

Incidentally, in reality, one embodiment of the present invention is a case in which the largest number of containers are packed, and it is clear that an intermediate stage between the two, that is, a method in which a portion is left empty without being packed, is also possible.

[Brief explanation of the drawing]

Figures 1 and 2 show a method of packing high-definition information in a conventional known method using a horizontal-vertical temporal frequency (μm).
FIG. FIG. 3 shows the second embodiment of the present invention using the same method as in FIGS. 1 and 2.
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Claims (1)

[Claims] The signal component of an NTSC television signal is modulated and multiplexed with high-definition information at a position conjugate with the color signal component when expressed in the time-vertical frequency domain, and at a low horizontal frequency region at the same position. A distinctive television signal processing method.