JPH07177379A - Television signal processor - Google Patents

Abstract

PURPOSE:To provide a television signal processor capable of generating data for signal processing without increasing the scale of hardware. CONSTITUTION:A programmable signal arithmetic circuit 14 instructs arithmetic contents by software so as to execute. A programmable control signal generator 15 generates various kinds of data by the instruction of software. A selector 3 selectively provides a television signal outputted from an A/D converter 1 or signal data to be used by the circuit 14 to the circuit 14. Signal data to be used in the circuit 14, the selection signal switching the operation of the selector 3 and a control signal controlling the circuit 14 are respectively assigned from data outputted from the generator 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television signal processing device for processing television signals.

[0002]

2. Description of the Related Art Recently, a television signal processing device for converting a television signal into a digital signal and processing the signal has been used. FIG. 4 is a block diagram showing an example of a conventional television signal processing device.
Here, a demodulation reference waveform data used for signal processing and a signal generator 7 for generating a signal such as a color bar signal are additionally provided.

In FIG. 4, an incoming television signal is input to an A / D converter 1 and a clock generation / synchronization separation circuit 2. The A / D converter 1 converts the input television signal into a digital signal and inputs it to the selector 3. The clock generation / synchronization separation circuit 2 includes an A / D converter 1, a signal generator 7, a signal calculation circuit 4, a control signal generator 5, and a D / A.
A clock is supplied to the converter 6, and a horizontal synchronizing signal (HSYNC), a vertical synchronizing signal (FSYNC) and a frame discrimination signal (FRM) are supplied to the signal generator 7 and the control signal generator 5.

The selector 3 selects the television signal input from the A / D converter 1 and the signal (data) input from the signal generator 7 and inputs them to the signal arithmetic circuit 4. If the selector 3 selects the A / D converter 1, A / D
The television signal input from the D converter 1 is input to the signal calculation circuit 4 as it is and subjected to calculation processing such as Y / C separation. On the other hand, when the selector 3 sets the screen position or the signal generator 7 is forcibly selected by the selection signal, the data output from the signal generator 7 is input to the signal arithmetic circuit 4.

Here, the signal generator 7 is, as shown in FIG. 5, an address generator 71, a ROM 72, and a latch circuit 73.
It is composed of As described above, when the selector 3 selects the signal generator 7, the data pre-recorded in the ROM 72 in the signal generator 7 is clocked by the clock generation / synchronization separation circuit 2, the horizontal synchronization signal, the vertical synchronization signal, A ROM address determined in advance according to the frame discrimination signal is read out and input to the selector 3. For example, in order to obtain a color bar signal, a selection signal is set to forcibly select the signal generator 7 instead of the input television signal, and a signal corresponding to the address on the screen is obtained from the ROM 72. Further, in order to obtain demodulation reference waveform data used for signal processing, a selection signal is set so as to select the signal generator 7 in the vertical (V) blanking period or the like, and the signal calculation circuit 4 calculates based on this data. To process. The image data that has undergone the necessary processing as described above is converted into an analog signal by the D / A converter 6 and output.

[0006]

As described above, in the conventional television signal processing apparatus, in order to generate signals such as demodulation reference waveform data and color bar signals, signals as shown in FIG. 5 are used. It was necessary to add the generator 7. This kind of circuit has a large device scale, and therefore, it is difficult for an ordinary television receiver (television signal processing device) to have this kind of circuit, that is, the signal generator 7. The present invention has been made in view of the above problems, and an object of the present invention is to provide a television signal processing device capable of generating data for signal processing without increasing the scale of hardware.

[0007]

In order to solve the above-mentioned problems of the prior art, the present invention is a television signal processing device for processing a television signal that has been converted into a digital signal. Programmable signal arithmetic circuit for instructing and executing, programmable control signal generator for generating various data according to software instruction, and the programmable signal arithmetic for selectively selecting the television signal and the signal data used in the programmable signal arithmetic circuit A selector for supplying to the circuit is provided, and a part of the data output from the programmable control signal generator is used as the signal data, and another part of the data is switched to switch the operation of the selector. The signal is supplied to the selector as a signal, and the programmable control signal is supplied. A television signal processing device, characterized in that a part of the data output from the generator is supplied to the programmable signal arithmetic circuit as a control signal for controlling the programmable signal arithmetic circuit. It is a thing.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A television signal processing device of the present invention will be described below with reference to the accompanying drawings. 1 is a block diagram showing an embodiment of a television signal processing device of the present invention, FIG. 2 is a partial block diagram for explaining the television signal processing device of the present invention, and FIG. 3 is a television signal processing of the present invention. It is a wave form diagram for explaining a device. In FIG. 1, the same parts as those in FIG. 3 are designated by the same reference numerals.

In FIG. 1, an incoming television signal is input to an A / D converter 1 and a clock generation / synchronization separation circuit 2. The A / D converter 1 converts the input television signal into a digital signal and inputs it to the selector 3. The clock generation / synchronization separation circuit 2 supplies a clock to the A / D converter 1, the programmable signal arithmetic circuit 14, the programmable control signal generator 15, and the D / A converter 6, and horizontally synchronizes with the programmable control signal generator 15. Signal (HSY
NC), vertical synchronization signal (FSYNC), and frame determination signal (FRM).

The selector 3 includes the television signal input from the A / D converter 1 and the programmable control signal generator 1.
The signal (data) inputted from 5 is selected and inputted to the programmable signal arithmetic circuit 14. Selector 3 is A /
When the D converter 1 is selected, the television signal input from the A / D converter 1 is directly input to the programmable signal arithmetic circuit 14 and subjected to arithmetic processing such as Y / C separation. On the other hand, when the screen position set by the selector 3 or the programmable control signal generator 15 is forcibly selected by the selection signal, the data output from the programmable control signal generator 15 is input to the programmable signal arithmetic circuit 14.

Here, the programmable signal arithmetic circuit 14
The programmable control signal generator 15 is operated by software and has already been put to practical use.
Originally, the programmable control signal generator 15 is used for generating control signals such as reset control of the memory in the programmable signal arithmetic circuit 14 or the arithmetic device in the programmable signal arithmetic circuit 14, but in the present invention, the programmable control signal generator is used. 15 is used as follows.

That is, as shown in detail in FIG. 2, among the signals (data) generated by the programmable control signal generator 15, each bit of a plurality of bits (for example, 8 bits) is signal data for signal generation. To use as
The data S0 to S7 are input to the selector 3. Furthermore, one of the signals generated by the programmable control signal generator 15
One is input to the selector 3 as a selection signal, and another one signal generated by the programmable control signal generator 15 is input to the programmable signal arithmetic circuit 14 as a control signal. By doing so, the signal data can be taken in a free place in the television signal.

As an example, when the ramp waveform data as shown in FIG. 3 is obtained, the television signal (from the A / D converter 1 to the programmable signal arithmetic circuit 14 via the selector 3 is utilized by utilizing the V blanking period or the like. Data A0-A
7) is replaced with data S0 to S7 and input. At this time, the programmable signal arithmetic circuit 14 switches its operation in synchronization with the instruction of the programmable control signal generator 15 to store this waveform (data) in the internal memory.
After that, the processing of the programmable signal arithmetic circuit 14 is returned to normal, and the stored data is used for reproduction. Also,
In order to obtain a signal such as a color bar, the selection signal output from the programmable control signal generator 15 is set so that the programmable control signal generator 15 is forcibly selected, and the signal corresponding to the position on the screen is set to the programmable control signal. Obtained from the generator 15. The image data subjected to the necessary processing by the programmable signal arithmetic circuit 14 as described above is converted into an analog signal by the D / A converter 6 and output.

As described above, the present invention effectively uses various data obtained from the programmable control signal generator 15 to increase the scale of hardware without increasing the scale of hardware.
It is possible to easily generate data necessary for signal processing such as demodulation reference waveform data and special signal data such as color bar signals. In the present embodiment, the programmable signal arithmetic circuit 14 and the programmable control signal generator 1 are controlled by the clock obtained from the incoming television signal.
Since 5 is operated, the data synchronized with the external image can be obtained.

In this embodiment described above, the programmable signal arithmetic circuit 14 and the programmable control signal generator 1 are used.
5 is used for each one, but a plurality may be used, and needless to say, a peripheral delay memory device or the like may be included.

[0016]

As described in detail above, the television signal processing device of the present invention includes a programmable signal arithmetic circuit for instructing and executing arithmetic contents by software.
A programmable control signal generator that generates various data according to software instructions and a selector that selectively supplies a television signal and signal data used in the programmable signal arithmetic circuit to the programmable signal arithmetic circuit are provided and configured. A part of the data output from the control signal generator is used as signal data, and the other part of the data is supplied to the selector as a selection signal for switching the operation of the selector. Since a part of the other part is configured to be supplied to the programmable signal arithmetic circuit as a control signal for controlling the programmable signal arithmetic circuit, the function of the programmable control signal generator can be effectively used without increasing the hardware scale. Data can be easily generated for processing. Can. Therefore, it becomes possible to realize a television receiver having a signal generator, which has been difficult in the past.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a partial block diagram for explaining the present invention.

FIG. 3 is a waveform diagram for explaining the present invention.

FIG. 4 is a block diagram showing a conventional example.

5 is a block diagram showing a specific configuration of a signal generator 7 in FIG.

[Explanation of symbols]

 1 A / D converter 2 Clock generation / synchronization separation circuit 3 Selector 6 D / A converter 14 Programmable signal arithmetic circuit 15 Programmable control signal generator

Claims (3)

[Claims] 1. A television signal processing device for processing a television signal converted into a digital signal, wherein a programmable signal arithmetic circuit for instructing and executing arithmetic contents by software and various data is generated by an instruction of software. A programmable control signal generator, and a selector for selectively supplying the television signal and signal data used in the programmable signal arithmetic circuit to the programmable signal arithmetic circuit are provided, and output from the programmable control signal generator. The data output from the programmable control signal generator, wherein a part of the data is the signal data and the other part of the data is supplied to the selector as a selection signal for switching the operation of the selector. The other part of Television signal processing apparatus characterized by being configured to supply to the programmable signal operation circuit as a control signal for controlling the enable signal calculation circuit. 2. The television signal according to claim 1, wherein the programmable signal arithmetic circuit processes the television signal by a signal generated based on the signal data and outputs the signal. Processing equipment. 3. The television signal processing apparatus according to claim 1, wherein the programmable signal arithmetic circuit outputs a signal generated based on the signal data instead of the television signal. .