JPH04137873A - Television receiver - Google Patents

Abstract

PURPOSE:To recognize what kind of programs are available in a ROM in advance and to offer the television receiver easily used by the user by displaying the program content stored in the ROM onto a CRT. CONSTITUTION:A microcomputer 6 extracts information representing a content of programs from a ROM 4 storing plural programs and information representing the content of the programs and displays the information on a CRT 8 as a menu. When a desired program content is commanded from a menu, the desired program is transferred to a digital signal processing means 3, in which object signal processing is implemented. Thus, the user recognizes what kinds of programs are stored in the ROM without labeling a keyword to represent the content of the ROM to a means for program selection of the user such as a remote controller or a switch on a receiver main body.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention (Industrial Application Field) The present invention relates to a television receiver, and more particularly to a television receiver having a processor that performs signal processing in software based on a program.

(Prior Art) In recent years, with the demand for higher image quality of television receivers, development of digital television receivers that perform digital signal processing of received television signals has been actively conducted. By digitizing signal processing, signal processing such as modulation/demodulation and filtering can be performed stably, and accurate time delays can be easily performed using line memory and frame memory. This is because high quality images can be achieved by performing /C separation and scanning line interpolation.

Conventionally, custom ICs have generally been used as the hardware that actually executes signal processing algorithms. However, each time the signal processing algorithm is changed, it is necessary to develop a new custom IC. This has the problem of not only cost but also a long period of time.

Therefore, it has been considered to perform digital processing of television signals using a digital signal processor (hereinafter referred to as DSP) that is controlled by software based on a program. DSP has the characteristic that it can realize various signal processing algorithms by writing it in software, so by taking advantage of this characteristic, TVs can create various special effects by changing the DSP program while using the same hardware. John receiver can be realized.

FIG. 8 shows the configuration of a television receiver using DSP. The video signal applied to the terminal 1 is subjected to general television signal processing such as Y/C separation and color demodulation in the video signal processing circuit 2, and then applied to the DSP 3. ROM
4 stores a plurality of programs to be processed by the DSP 3.

The user inputs selection information to terminal 5 using the selection switch attached to the receiver body or the remote control, selects one of the DSP programs in ROM 4, and microcontroller 6 transfers the selected program to the program memory in DSPB. (
load). DSP3 processes signals according to the loaded program. The signal 7 processed by the DSP 3 is applied to the CRT 8 and displayed as an image.

FIG. 9 shows an example of the internal configuration of the DSP. In the program memory 31, instructions to be executed are stored in advance in order. A program counter (PC) 32 indicates the location (program memory address) where the next instruction to be executed in the program memory 31 is stored, and increases its value by one each time an instruction is executed. Program memory 3 shows where the instructions to be executed are stored.
1 executes the arithmetic processing unit (AL) according to the stored instruction information.
U)33. Internal register 34. Input register (IRI)
35. and controls the output register (ORI) 36. The arithmetic processing unit (ALU) 33 performs addition (ADD) and subtraction (SU).
B) The input register 35, which performs arithmetic processing such as comparison (CMP), is a register for receiving input data from the input terminal 37, and the output register 36 is a register for outputting the calculated data. . Internal register 34
is a register for storing input data and calculated data. A data bus 39 connects the ALU and each register.

Figure 10 shows examples of instructions that can be executed by the DSP, including operational instructions such as addition (ADD), subtraction (SLIB), and comparison (CMP), MOv instructions for moving data, and changing the value of the program counter 32. JMP, BRPL, B
It has commands such as RMI commands.

By the way, when a ROM stores many types of programs and the user wants to select a desired program from among them, the user needs to know the contents of the program. In such cases, if the ROM is fixed, the user can know the contents by displaying a label on the selection switch in advance, but it is possible to change the program contents in advance by rewriting the contents of the ROM or replacing the ROM itself. When it is impossible to display a label, a problem arises in that the user cannot easily know the contents of the program.

(Problems to be Solved by the Invention) As described above, in the conventional television receiver using a DSP, there is a problem in that it is not possible to know in advance what kind of programs are in the ROM.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a television receiver that displays program contents stored in a ROM on a CRT, making it easier for the user to use.

[Configuration of the Invention (Means for Solving the Problems) The television receiver of the present invention is controlled by software by a program, processes a video signal supplied as an input, and processes the signal-processed signal. a digital signal processing means for outputting the information to the CRT, a memory in which a plurality of programs to be executed by the digital signal processing means and information indicating the contents of the programs are written, and an instruction signal from the user is received and the instruction signal is decoded. and means for reading information indicating the program content from the memory and transmitting it to a display device for displaying characters on a CRT;
means for receiving an instruction signal from a user, decoding the instruction signal, reading out a predetermined program from the plurality of programs to be executed by the digital signal processing means from the memory, and transmitting the read program to the digital signal processing means; It is characterized by the following:

(Operation) In the present invention, information indicating the contents of a program is extracted from a ROM storing a plurality of programs and information indicating the contents of the programs, and a menu is displayed on the CRT. Thereafter, when a desired program content is specified from the menu, the desired program is transferred to the digital signal processing means and the desired signal processing is performed. If you do this,
The user knows what programs are stored in the ROM even if the user's program selection means, such as a remote control or a switch on the receiver, are not pre-labeled with keywords to indicate the contents of the ROM. be able to. This is especially useful when there are many types of programs.

(Example) Examples will be described with reference to the drawings.

FIG. 1 is a block diagram showing a television receiver according to an embodiment of the present invention.

In FIG. 1, a video signal processing circuit 2 is connected to a video signal input terminal 1, and a DSP 3 is connected to the output of the circuit 2. A CRT8 is connected to the output of the DSP3.

On the other hand, a ROM 4 storing information such as programs is connected to a load terminal of the DSP 3 via a microcomputer 6. An instruction signal from the remote control receiving terminal 5 is input to the microcomputer 6, and the microcomputer 6 transmits information in the ROM 4 to the character display circuit 9 or the DSP 3 according to the instruction signal.
Transfer to. The DSP 3 processes the video signal according to the program transferred from the ROM 4.

A menu is displayed on the CRT 8 based on the output of the character display circuit 9, and when an instruction is given to select a desired program from the menu, the DSP 3 performs predetermined signal processing, and the video signal processed signal is displayed on the CRTS. will be displayed. Next, the operation shown in FIG. 1 will be explained in detail with reference to FIGS. 2 to 4.

A baseband video signal subjected to video detection is input to the input terminal 1 . This video signal is processed by the video signal processing circuit 2.
Signal processing such as Y/C separation and color demodulation is performed, and the DSP3
join. The ROM 4 stores a program as shown in FIG.

That is, three programs are stored: 1. A program to create a mosaic effect, 2. A program to create a gradation reduction effect, and 3. A program to create a negative film effect. Information indicating the contents of the ROM and information indicating at which address each program is stored are stored. Program 1 above is located at addresses 0000 to 1000, program 2 is located at addresses 1000 to 2000, and program 3 is located at addresses 2000 to 2000.
It is stored at addresses 00 to 3000.

Also, the information to indicate the ROM contents is 3000°302
It is stored at address 0.3040.

An instruction signal from the remote controller is input to the terminal 5. Third
The figure shows the operation panel of the remote control.In addition to the usual functions for controlling the television, such as changing channels and adjusting the volume, this remote control also has functions for selecting programs. The user presses the channel change key 21 on the remote control.
When you have selected the channel you want to watch, a normal TV reception screen is displayed, but when you press the menu key 22 on this remote control, the microcomputer 6 receives no information from the remote control reception terminal 5 that you pressed the menu key. , ROM4
Access addresses 3000, 3020, and 3040 to obtain the menu information of the stored programs,
The zero character display circuit 9 transfers this to the character display circuit 9, and the program menu is displayed on the screen of the CRT 8 as shown in FIG. This can be achieved by using technology equivalent to the current character multiplex adapter technology.

Now, on the menu display shown in Figure 4, select 1. The item is highlighted. The user presses select key 2 on the remote control.
3. Change the highlighted items in step 24 and select the item you like. When the execution key 25 is pressed with the mosaic highlighted as shown in Figure 4, the microcomputer 6 reads the mosaic program from the ROM 4 and the DS
Transfer to P3. Then, the DSP 3 performs mosaic processing on the video signal and displays a mosaic effect screen on the CRTS.

FIG. 5 is a block diagram showing another embodiment of the present invention.

In this embodiment, the character display function in the embodiment shown in FIG. 1 is also provided by the DSP 3.

In FIG. 5, a video signal processing circuit 2 is connected to a video signal input terminal 1, and a DSP 3 is connected to the output of the circuit 2. A CRT8 is connected to the output of the DSP3.

On the other hand, a ROM 4 storing information such as programs is connected to a load terminal of the DSP 3 via a microcomputer 6. An instruction signal from the remote control receiving terminal 5 is input to the microcomputer 6, and the microcomputer 6 transfers information in the ROM 4 to the DSP 3 in accordance with the instruction signal.

Further, a character font ROM10 for displaying a menu is connected to the microcomputer 6. A refresh memory 11 is connected to the DSP 3 for writing font information for menu display when displaying a menu. DSP3 transfers the program transferred from ROM4 to DS
According to the program, video signals are processed and displayed on the CRT 8, and font information for menu display is stored in the refresh memory 1.
1 or to display information read from the refresh memory 11 on the CRT 8. CRT8
A menu is displayed based on the output of DSP3,
Thereafter, when an instruction is given to select a desired program from the menu, the DSP 3 performs predetermined signal processing, and the processed signal is displayed on the CRTS.

Next, the operation shown in FIG. 5 will be explained in detail with reference to FIGS. 6 and 7.

A baseband video signal subjected to video detection is input to the input terminal 1 . This video signal is processed by the video signal processing circuit 2.
Signal processing such as Y/C separation and color demodulation is performed, and the DSP3
join. The ROM 4 stores a program as shown in FIG.

That is, three programs are stored: 1. A program to create a mosaic effect, 2. A program to create a tone reduction effect, and 3. A program to create a negative film effect. Information indicating the contents of the ROM and information indicating the address at which each program is stored are stored therein, and a DSP program for menu display is also stored therein.

An instruction signal from the remote controller is input to the terminal 5. 7th
The figure shows the processing flow of the microcomputer after receiving a menu display signal at the remote control receiving terminal 5.

In Figure 7, 41 is 3000.302 of ROM4.
Access address 0.3040 and read character information for menu display. The character information is recorded, for example, in JIS Kanji code. In step 42, the character font ROM10 in which graphic information of characters is stored is accessed based on this code and the graphic information is read. 6th
The menu display program stored at address 38000 in the figure is divided into two parts, one is 4 in Figure 6.
This is the part shown in 3. In 43, microcontroller 6 is DSP3
The font information and its display position information are stored in the program memory of the DSP 3, and a program for writing the font information into the refresh memory 11 based on the display position information is read from the ROM 4 and stored in the program memory of the DSP 3.

The DSP 3 executes this program and writes it into the refresh memory 11. At step 44, when the DSP 3 finishes writing to the refresh memory 11, the microcomputer 6 reads another part of the menu display program from the ROM 4 and writes it to the program memory of the DSP 3. Another program of this menu display program is a program for reading the refresh memory 11 and sending a signal to the CRT 8 in synchronization with the timing when the DSP 3 scans the CRTS. When the DSP 3 executes this program, a display as shown in FIG. 4 becomes possible.

In the embodiment shown in FIG. 5, the character font ROM
10 was configured to have it separately from ROM4, but of course the RO
The ROM 4 may also be configured to be accessed for character fonts by using a specific address range of M4.

Furthermore, the character font ROM10 can be accessed from the DSP 3, and a program can be created to cause the DSP 3 to execute the process of converting character codes into graphic information.

[Effects of the Invention] As described above, according to the present invention, the program contents stored in the ROM can be displayed on the CRT, so the user can know in advance what kind of programs are in the ROM. . Therefore, there is no need to pre-label the remote control or the switch on the receiver body with keywords to indicate the contents of the ROM, and it is possible to label the contents in advance by rewriting the ROM contents or replacing the ROM itself. Even in cases where this is not possible, the contents of the program can be easily known. Furthermore, the present invention is also useful when there are so many programs that they cannot be displayed on the remote control for program selection or on the switch panel on the receiver body.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing a television receiver according to an embodiment of the present invention, Fig. 2 is an explanatory diagram explaining the contents of the ROM in Fig. 1, and Fig. 3 is a block diagram showing a television receiver according to an embodiment of the present invention. FIG. 4 is an explanatory diagram showing an example of the display screen of the receiver shown in FIG. 1, FIG. 5 is a block diagram showing another embodiment of the present invention, and FIG. 5 is an explanatory diagram explaining the contents of the ROM, FIG. 7 is an explanatory diagram explaining the processing flow of the microcomputer in FIG. 5, FIG. 8 is a block diagram showing a conventional television receiver, and FIG. 9 is a DSP A block diagram showing an example of the internal configuration of the D
FIG. 3 is an explanatory diagram showing an example of commands that an SP can have. 1...Video signal input terminal, 3...DSP, 4...
ROM, 5...Remote control reception terminal, 6...Microcomputer, 9...Character display circuit. ) Mokoshi Iff' et al. 1 Figure 3 Cause 4 Figure 5 Figure 7 Figure External Figure 8

Claims (1)

[Claims] Digital signal processing means that is controlled in software by a program, processes a video signal supplied as an input, and outputs the processed signal to a CRT; It receives an instruction signal from the user, reads out information indicating the program contents from the memory, and writes the characters on a CRT. means for transmitting the data to a display device for display; receiving an instruction signal from a user, decoding the instruction signal, reading out a predetermined program from the plurality of programs to be executed by the digital signal processing means from the memory; A television receiver comprising means for transmitting to digital signal processing means.