JP3296682B2 - Television receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver, in which an operator can change the gain of the contrast, sharpness, color signal, and volume of a video signal by an operator, and controls the gain control signal by a microcomputer. From a television receiver.

[0002]

2. Description of the Related Art Conventionally, in television receivers, a user can adjust the volume according to his / her preference, color,
There are contrast and sharpness. By the way, recently, adjustment of a user is generally performed by transmitting a remote control signal from a remote control device or the like, and the television receiver side uses a microcomputer (microcomputer) according to the adjustment amount operated by the user. (A microcomputer) generates a pulse (pulse width-modulated pulse signal or signal indicating serial data), converts the pulse voltage into a DC voltage in accordance with the pulse signal, and supplies the DC voltage to a point to be adjusted in a television signal processing circuit. Thereby, the adjustment amount desired by the user can be obtained.

[0003] The data of the plurality of adjustment items adjusted by the user are stored in a nonvolatile memory or the like.
Since the adjusted state is maintained even when the power of the television receiver is turned off, the user can view the adjusted state even when the television receiver is turned on again. Such a television receiver is disclosed in, for example, Japanese Patent Application Laid-Open No. 56-114.
This is a known technique as disclosed in Japanese Patent Publication No. 482 (H04N5 / 44).

[0004] However, although the standard of the signal of the television signal transmitted from each broadcasting station is unified, it is only necessary to be within the allowable range of the standard. Therefore, the level of the video signal, the color signal, the volume, etc., is slightly different.

[0005] For this reason, the user changes the level of the television signal every time the channel is switched, so if the user tries to watch the television signal in the same state,
There is a problem that each adjustment level must be set each time the channel is changed.

In order to eliminate such a complicated operation,
The adjustment data adjusted so as to have an appropriate video signal, color signal, and volume for each channel is stored in a memory, and when the channel is selected, the stored data is read out, and the television adjusted based on the data is read out. You can watch the signal.

However, if the number of broadcast stations to be tuned is small, it is good. However, if there are many broadcasts to be tuned, it is necessary to perform an operation of adjusting the adjustment amount for each selected channel. If the number of selected channels is large, the memory area for storing the adjustment amount must have a sufficiently large capacity.

For example, if the position of the channel that can be selected is 60, the tuning data of each position and the adjustment amount thereof, that is, the contrast and sharpness,
If it is necessary to adjust four of the color and the volume, the data amount of one adjustment item requires 6 bits.
A memory capacity of as much as 0 bits is required.

[0009]

SUMMARY OF THE INVENTION According to the present invention, in order to solve the above-mentioned drawbacks, when a plurality of adjustment amounts for each channel are stored in a memory as data adjusted to an appropriate value,
An object of the present invention is to reduce the amount of data to be stored and to simplify the operation of storing.

[0010]

SUMMARY OF THE INVENTION The present invention provides a receiving means for receiving television signals of a plurality of channels, a selecting means for selecting a desired television signal from the television signals of the plurality of channels, and the selecting means. Signal processing means for performing signal processing on the television signal selected by the means; and when the signal processing means performs signal processing on the television signal received by the receiving means, the operator can arbitrarily adjust the gain of the signal processing means. And a gain by the control means of the signal processing means according to a state of receiving the television signal of each of the plurality of channels and storing the channel selection data of each of the plurality of channels. And a memory means for storing data for changing the variable rate of the television receiver. That.

The present invention is also directed to a television receiver, characterized in that the memory means stores a video signal of a television signal, a color signal, or a variable rate of a volume gain. is there.

Further, the present invention is the television receiver, wherein the variable rate stored in the memory means is in a range of 0.5 to 2.

[0013]

According to the present invention, with the above-described configuration,
By selecting the coefficient of the rate of change of the gain for the signal characteristics of the reference television signal for each channel position and storing it in the memory, the signal gain can be changed to a signal gain corresponding to the television signal for each position. Can be.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of the present invention, wherein 1 is a tuner, 2 is a VIF amplifier, 3 is a video detector, 4 is a video amplifier, 5 is a color demodulator, 6 is a color amplifier, 7 is a matrix circuit, 7 is a matrix circuit, 8 is a mixing circuit, 9 is a CRT
(Cathode tube), 10 is an SIF detection circuit, 11 is an audio detection circuit, 12 is an audio amplification circuit, 13 is a speaker, 14 is a microcomputer, and 15 is an operation unit (this operation unit 15 is a remote control device and a television receiver. 16 may be a non-volatile memory, 17 is a character generation circuit, and 18 is an LPF (Low Pass Filter).

Next, the operation will be described. First, the operation unit 15
When the user selects a position corresponding to the desired channel from, the microcomputer 14 reads out the tuning data corresponding to the selected channel from the memory 16. The tuning data is stored in the memory 16 for each position, and when the position is selected by the operation unit 15, the tuning data at the corresponding position is read.

The tuning data corresponding to the position selected by the operation unit 15 supplies a tuning voltage from the microcomputer 14 to the tuner 1 so that a television signal of a desired channel can be received. From the received television signal, a video signal is obtained by a video detection circuit 3 via a VIF amplification circuit 2, and the video signal is amplified by a video amplification circuit 4.

On the other hand, the color difference signal (R-
Y, BY) are reproduced, and the color difference circuit 6 amplifies the color difference signal. Then, the matrix circuit 7 is operated by the color difference signal.
Creates an RY signal, a GY signal, and a BY signal, and outputs a three primary color signal based on the video signal.

The three primary color signals and the character generation circuit 17
The signal output from the CRT is mixed by a mixing circuit 8 to form a CRT.
9 is output. For example, the character generation circuit 17 converts a channel selected by a command from the microcomputer 14 into a CRT.
9 generates three primary color signals for displaying characters, and generates three primary color signals for displaying an adjustment item and an adjustment amount when an operator adjusts the volume and the like described later.

On the other hand, the SIF detection circuit 10 detects the SIF signal, and the audio detection circuit 11 outputs an audio signal.
The audio signal is amplified by the audio amplifier circuit 12 and then output to the speaker 13.

Next, various adjustment items and an adjustment method for a user to obtain a desired viewing state will be described. First, the operation unit 15 is provided with a switch as shown in FIG. 3, and a color switch 31 for adjusting a color signal.
A volume switch 32 for adjusting the volume, a contrast switch 33 for adjusting the contrast of the video signal, a sharpness switch 34 for adjusting the sharpness (image quality) of the video signal, an UP switch 36 for increasing various adjustment amounts,
There are a DOWN switch 37 for decreasing the value and a correction mode switch 35 for changing the gain of various adjustment amounts.

First, when the color switch 31 is pressed, the microcomputer 14 generates a character for color adjustment and a character for displaying a bar indicating the adjustment amount from the character generation circuit 17 and outputs the character to the CRT 9. And the microcomputer 14
Is based on the adjustment data stored in the memory 16 set by the user in advance (each adjustment amount is stored in the memory 16, and when the television receiver operates, each adjustment item is The pulse width modulated PWM signal is output, converted into a DC voltage by the LPF 18, and supplied to a portion to be adjusted. That is, if it is a color, the adjustment voltage is supplied to the color amplification circuit 6 and
The adjustment amount is increased by the P switch 36, and the DOWN switch 3
DOWN at 7 to determine the adjustment amount.

When the volume switch 32 is pressed, the volume can be controlled by controlling the audio amplifier circuit 12, and when the contrast switch 33 is pressed, the contrast can be adjusted by controlling the video amplifier circuit 4 and the sharpness switch 34 is pressed. By controlling the video amplifier circuit 4, the sharpness can be controlled. The adjustment amount thus adjusted is stored in the memory 16.

The adjustment amount is divided by the microcomputer 14 into 64 adjustment steps as shown in FIG. 4, and the DC voltage based on the PWM output changes.
Normally, the characteristic changes as shown by the solid line of B = 1 in FIG.

As described above, the user can obtain a desired viewing state. However, as described in the related art, the user must change the above-described adjustment amount for each reception channel. Therefore, in the present invention, the above-described step characteristics shown in FIG. 4 can be set for each position as follows.

This operation will be described with reference to the flowchart of FIG. First, when a correction mode switch 35 shown in FIG. 3 of the operation unit 15 is pressed, a user gain correction mode (S2) is entered. Then, the correction data B stored in the memory 16 is read. This correction data changes the step characteristic of FIG. 4 and is a coefficient (B) for doubling, halving, or 1.5 times the gain of the correction characteristic. In the correction data, the characteristic is initially a coefficient of B = 1 as a standard for the step.

Next, the user inputs the correction data B to the operation unit 1.
5 can be changed by the UP switch 36 or the DOWN switch 37. For example, when changing the volume, when the user gain correction mode is set, a screen as shown in FIG.
Displayed on RT9. That is, when the normal volume is controlled, the control target item and the adjustment amount are displayed as bars as shown in FIG. 6A, but the screen becomes as shown in FIG. 6B. Then, a bar 61 representing the coefficient is displayed. This bar 61 has a coefficient B
= 1, it is displayed at the center, when coefficient B = 1.5, it is displayed between the right and center, when coefficient B = 2, it is displayed on the right, and when coefficient B = 0.5, Displayed on the left.

When the user presses the UP switch 36, the coefficient becomes B = 1.5, the screen display is displayed as shown in FIG. 6C, and the sound volume is also changed to the step characteristic of FIG. 5 (gain is 1.5 times). The changed correction data B is written to the memory (S
9) Output the output data C = A × B obtained by multiplying the data A actually adjusted by the user and the correction data B (S4). If the data C is 63 or more in the output data (S
5), C = 63 (S6), otherwise C = A
An XB PWM signal is output (S7). If the user gain correction mode does not end, the correction data B
After completion, the data is stored in the memory 16 as it is (S11).

The user gain correction mode is ended by pressing the correction mode switch 35 of the operation unit 15 again, and the screen is displayed as shown in FIG. 6D. A separate switch may be provided to end the user gain correction mode.

As described above, the correction data B is performed for each adjustment item, color, volume, contrast, and sharpness, and is stored for each position in the memory 16. As shown in FIG. 5, in the memory 16, correction data B is stored in 2 bits together with tuning data for each position (for example, 00 is B = 0.5, 01 is B =
1 and 10 are B = 1.5, and 11 is B = 2).

When the correction data B is stored for each position as described above, if the normal user enters a mode for controlling the adjustment amount (S1), the adjustment amount data A previously adjusted by the user is stored. The memory 16 is read (S2), and when the user changes the adjustment amount, the changed data A is stored in the memory 16 (S3), and the correction data B is stored as described above.
And outputs a PWM signal.

By doing so, for example, if the rate of change is 0.5, 1, 1.5, and 2, the capacity stored in the memory for each position is 4 × 2 bits × 60 compared to the prior art.
Position = 480 bits.

Further, it goes without saying that not only the four types of change rates described above but also the change rate may be made finer and selectable.

[0033]

As described above, according to the present invention, it is possible to reduce the complicated work for the user to change the adjustment data such as color, volume, contrast, sharpness and the like for each tuning position and store the adjustment data in the memory. This has the effect of reducing the required capacity.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing the operation of the embodiment of the present invention.

FIG. 3 is a diagram showing an operation unit of the present invention.

FIG. 4 is a diagram showing a step characteristic of an adjustment amount according to the present invention.

FIG. 5 is a configuration diagram of a memory of the present invention.

FIG. 6 is a diagram showing a screen display state of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tuner 2 VIF amplification circuit 3 Video detection circuit 4 Video amplification circuit 5 Color demodulation circuit 6 Color amplification circuit 7 Matrix circuit 8 Mixing circuit 9 CRT (cathode ray tube) 10 SIF detection circuit 11 Audio detection circuit 12 Audio amplification circuit 13 Speaker 14 Microcomputer 15 operation unit 16 non-volatile memory 17 character generation circuit 18 LPF (low-pass filter)

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04N 5/44 H04N 5/60 H04N 9/68 101

Claims (3)

(57) [Claims] 1. A receiving means for receiving television signals of a plurality of channels, a selecting means for selecting a desired television signal from the television signals of the plurality of channels, and a television signal selected by the selecting means Signal processing means for performing the signal processing of, and when the television signal received by the receiving means is subjected to signal processing by the signal processing means, control means for allowing the operator to arbitrarily change the gain of the signal processing means, Storing the channel selection data of each of the plurality of channels, and changing the variable rate of the gain by the control unit of the signal processing unit in accordance with the state of receiving the television signal of each of the plurality of channels. A television receiver comprising: memory means for storing. 2. The television receiver according to claim 1, wherein said memory means stores a video signal of a television signal, a color signal, or a variable rate of a gain of a sound volume. Television receiver. 3. The television receiver according to claim 2, wherein the variable rate stored in the memory means is 0.5.
A television receiver having a range from 1 to 2.