JP3133644B2 - Display control method in FM multiplex 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 display control method in an FM multiplex receiver, and more particularly to, for example, a so-called "visible radio", wherein at least one page included in a plurality of pages of received data stored in a first memory. The present invention relates to a display control method in an FM multiplex receiver that converts received data into display data, stores the display data in a second memory, reads the display data, and displays the read data on a monitor.

[0002]

2. Description of the Related Art In a conventional FM multiplex receiver, when a digital signal (broadcast data) multiplexed on an FM broadcast signal is received, a CPU stores the broadcast data in a memory as a character code or graphic coordinate data. Next, CP
U reads out the broadcast data corresponding to the program number or page number keyed by the operator from the memory, develops it into a bitmap, and displays it on the monitor.

[0003]

However, in such a conventional technique, since the received data is developed into a bit map after a key input from an operator, it takes a long time from the key input to the display. was there. Therefore, a main object of the present invention is to provide a display control method in an FM multiplex receiver that can reduce the time from key input to display.

[0004]

According to the present invention, broadcast data for a plurality of pages having a hierarchical structure in which a plurality of programs that can be transferred from the program are connected to one program are received and received. Storing the broadcast data in a first memory;
FM multiplex reception in which at least one page of received data included in a plurality of pages of received data stored in a memory is converted into display data and stored in a second memory, and the display data is read from the second memory and displayed on a monitor. (A) displaying a current page, and (b) displaying the current page.
It is determined whether the display data of the first page of all programs that can be shifted from the current page of the program displayed in (a) is stored in the second memory, and only when the display data is not stored, the display data is A display in the FM multiplex receiver for reading out from the first memory and storing it in the second memory, and (c) displaying display data of a corresponding page of a predetermined program stored in the second memory in response to a page update command It is a control method.

[0005]

When receiving broadcast data for a plurality of pages, for example, the CPU stores all received broadcast data in the first memory, converts at least one page of the received data into display data, and stores the display data in the second memory. Next, the CPU displays the display data on the monitor, and thereafter determines whether or not the display data of the first page of all programs which can be transferred from the display data is stored in the second memory. Display data is read from the first memory and stored in the second memory. Subsequently, the CPU displays the first page of the predetermined program stored in the second memory on the monitor in response to the page update command.

[0006]

According to the present invention, after displaying the display data of the current page on the monitor, without waiting for the page update command,
Since the display data of the first page of all programs that can be shifted from the current page is stored in the second memory, the time from key input to display can be reduced. Also, it is determined whether or not the display data of the first page of all the programs that can be shifted from the display data is stored in the second memory, and if not stored, the display data is read out from the first memory and stored in the second memory. Since the data is stored, the data that has already been developed is not developed again, and the display delay can be further reduced. The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

[0007]

FIG. 1 shows a frame structure of a digital signal (broadcast data) multiplexed on an FM broadcast signal. One frame is composed of 272 blocks.
A 6-bit BIC (Block Identification Code) is added, and is used for reproduction of frame synchronization and block synchronization. Of the 272 blocks, 190 blocks are packets for transmitting data, and 82 blocks are parity packets for transmitting parity in the column direction. In the data transmission packet, a 176-bit data packet and a 14-bit CRC (Cyclic Returndancy Cooperation) follow the BIC.
de) and an 82-bit parity part are provided.

The FM multiplex signal on which such broadcast data is multiplexed is transmitted to the antenna 1 of the FM multiplex receiver 10 shown in FIG.
2 and provided to the front end 14. In the front end 14, the FM multiplex signal is converted into an IF signal by the oscillation frequency signal from the local oscillation circuit 16. The converted IF signal is then subjected to FM detection by an IF amplification and detection circuit 18, and the FM detection signal is converted to a multiplexer 20 and an LMSK (Level-cotrolled Minimum
Shift Keying). The multiplexer 20 generates an audio signal based on the FM detection signal,
The LMSK demodulation circuit 22 demodulates the broadcast data having the frame configuration shown in FIG. The demodulated broadcast data is synchronously reproduced by the synchronous reproduction and error correction circuit 24 in accordance with the BIC and error-corrected in accordance with the parity code. Broadcast data that has undergone these processes is supplied to the CPU 26.

When the broadcast data is for a recorded program, the CPU 26 writes the broadcast data for the previous page into the memory 28 as a character code. afterwards,
In response to a key input signal corresponding to the operation of the operation button 30 by the operator, the CPU 26 converts the broadcast data of a specific page into bitmap image data, and stores it in any of the bitmap areas 32a to 32f included in the monitor 32. Write and then display on monitor 34.

FIG. 3 shows a tree structure of a program. A program a, a program (menu) A and a program (menu) B are connected to the program (top menu) T. The menu A is connected to the program b and the program (menu) D, and the menu B is connected to the program e and the program (menu) C
Are connected. Further, programs c and d are connected to menu D, and programs f and B are connected to menu C. After menu B, program e, menu E, and program f are repeated as described above.

The CPU 26 processes broadcast data in accordance with an algorithm shown in FIGS. 4 to 8 in accordance with a key input signal from the operation button 30. That is, first, the top menu T is displayed in step S1 of FIG. 4, and then the first page of all programs which can be shifted from the top menu T is developed in step S3. That is, the first page of all programs is written as bitmap image data in each area of the memory 32 including the plurality of bitmap areas 32a to 32f.
Subsequently, in step S5, it is determined whether or not a key input has been made from the operation button 30, and if "YES", it is determined in step S7 whether or not the top menu T is being displayed on the monitor 34. If "YES" here, the process shifts to the step S11 in FIG. 5, but if "NO", it is determined whether or not any of the menus A to D is being displayed on the monitor 34 in a step S9. If "YES" here, the process shifts to the step S33 in FIG. 6. If "NO", it is determined that any of the programs a to e is being displayed on the monitor 34 and the process proceeds to the step S69 in FIG. Transition.

Referring to FIG. 5, in step S11, it is determined whether or not the key input in step S5 is an input of program selection key 30c. The program selection key 30c includes cursor keys 30c1 and 30c2. The top menu T or the menus A to
After selecting a desired program from D, enter key 30c2
Is pressed, "YES" is determined in the step S11. On the other hand, when only the enter key 30c2 is pressed or another key is pressed after the cursor key 30c1 is pressed, the input of the enter key 30c2 and the input of the cursor key 30c1 are invalidated. Since only the program selection key 30c is valid during the display of the top menu T, if "NO" is determined in the step S11, the process returns to the step S5. However, if "YES" is determined in the step S11, the bit map image data of the first page of the selected program is read out from the memory 32 and displayed on the monitor 34 in a step S13. It is determined whether the selected program is any of menus A to D. If "YES" here, it is determined in step S17 whether the first page of the destination program of the menu has been developed. If the data has been developed, the process directly returns to step S5.
In step 9, the page is developed, and the process returns to step S5. on the other hand,
If "NO" in the step S15, it is determined that the selected program is any of the programs a to f, and in a step S21, it is determined whether or not pages before and after the page have been developed. If all pages have been developed, the process directly returns to step S5. If any page has not been developed, the page is developed in step S23 and the process returns to step S5.

Referring to FIG. 6, steps S25-S39
Is the same as Steps S11 to S23 shown in FIG. 5, and a duplicate description will be omitted. However, step S
If “NO” in 25, that is, if the program selection key 30c is not pressed while any of the menus A to D is displayed, the process proceeds to step S41 in FIG. Step S41
Then, the key input in step S5 is the menu key 3
It is determined whether the input is 0d. Here "YES"
If so, in step S43, the first page of the menu connected to the currently displayed menu is read from the memory 32 and displayed on the monitor 34, and then in step S45
Then, it is determined whether the first page of the destination program of the menu has been expanded. If “YES” here, the process directly returns to the step S5. If “NO”, the first page of the program is developed in a step S47 and the process returns to the step S5. On the other hand, if “NO” in the step S41, a step S4
In step S9, it is determined whether the key input in step S5 is an input of the top menu key 30e. And "Y
If "ES", the top menu T is displayed in step S51, and then it is determined in step S53 whether or not the first page of all programs which can be shifted from the top menu T has already been developed. However, if the program has not been developed, the first page of all programs which can be shifted to in step S55 is developed and the process returns to step S5.
When any of menus A to D is displayed on the monitor 34, the program selection key 30c and the menu key 30c are displayed.
Since other than d and the top menu key 30e are invalid, if “NO” in the step S49, the process returns to the step S5.

In step S57, the key input in step S5 is the previous page key 30a or the next page key 3.
0b is determined. If "YES" here, the bitmap data of the page corresponding to the key input is read from the memory 32 and displayed on the monitor 34 in a step S59. Next, in step S61, the monitor 34
It is determined whether both the previous page and the next page of the page displayed in (1) have already been developed, and if “YES”, the process directly returns to step S5; if “NO”, the page not developed in step S63 And step S
Return to 5. On the other hand, if “NO” in the step S57,
In step S65, it is determined whether the key input in step S5 is an input of the menu key 30d. If "YES" here, in a step S67, the first page of the menu connected to the currently displayed program is read out from the memory 32 and displayed on the monitor.
At 69, it is determined whether one page of the destination program in the displayed menu has been expanded. If “YES” here, the process directly returns to step S5. However, if “NO”,
The page is developed in step S71, and the process returns to step S5.

If "NO" in the step S65, it is determined whether or not the key input in the step S5 is an input of the top menu key 30e in a step S73. If "YES", the top menu T is displayed in a step S75, and thereafter, in a step S77, it is determined whether or not the first page of all programs which can be shifted from the top menu T has already been developed. If "YES", the process directly returns to step S5, but if "NO", the process proceeds to step S7.
In step 9, the first page of all programs that can be shifted from the top menu is developed, and the process returns to step S5. When any one of the programs a to f is displayed on the monitor 34, the program selection key 30c is invalid, so "NO" in step S73.
If so, the process returns to step S5.

As described above, since the CPU 26 performs the processing, when the top menu T is displayed on the monitor 34,
3, the first page of the program a and the menu A are stored in the bitmap areas 32a to 32c of the memory 32.
And B are expanded. Here, when the operator selects the menu A by operating the program selection key 30c, the menu A is displayed on the monitor 34, and the program b and the menu D are developed in the bitmap areas 32a and 32c. Subsequently, when the operator operates the program selection key 30c to select the program b, the first page of the program b is displayed on the monitor 34, and then the second page and the last page of the program b are developed in the bit map area 32a. You. Next, when the operator presses the menu key 30d, the menu A leading to the program b is displayed on the monitor 34. At this time, since the menu A is not expanded in the memory 32, the menu A written in the memory 28 is not stored.
Is displayed on the monitor 34 after being expanded in the memory 32.
Similarly, when the operator presses the top menu key 30e, the data written in the memory 28
2 is displayed on the monitor 34 after being developed.

According to this embodiment, after the display data of the current page is displayed on the monitor 34, the bitmap image data of the next page is written into the memory 32 without waiting for the display command of the next page. The time until display can be shortened.

[Brief description of the drawings]

FIG. 1 is an illustrative view showing a frame configuration of a digital signal multiplexed on an FM broadcast signal;

FIG. 2 is a block diagram showing one embodiment of the present invention.

FIG. 3 is an illustrative view showing a part of the embodiment in FIG. 1;

FIG. 4 is a flowchart showing a part of the operation of the embodiment in FIG. 1;

FIG. 5 is a flowchart showing a part of the operation of the embodiment in FIG. 1;

FIG. 6 is a flowchart showing a part of the operation of the embodiment in FIG. 1;

FIG. 7 is a flowchart showing a part of the operation of the embodiment in FIG. 1;

FIG. 8 is a flowchart showing a part of the operation of the embodiment in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... FM multiplex receiver 22 ... LMSK demodulation circuit 24 ... Synchronous reproduction | regeneration and error correction circuit 26 ... CPU 28,32 ... Memory 30 ... Operation button 34 ... Monitor

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masahiro Seto 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Software Co., Ltd. (56) References JP-A-7-50603 (JP, A) Kaihei 5-168015 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) H04B 1/16 H04H 1/00

Claims (1)

(57) [Claims] A broadcast program for a plurality of pages having a hierarchical structure in which a plurality of programs which can be transferred from the program are connected to one program, and the received broadcast data is stored in a first program.
The received data for at least one page included in the received data for a plurality of pages stored in the first memory is converted into display data and stored in the second memory, and the display data is read out from the second memory. A display control method for an FM multiplex receiver displayed on a monitor, comprising: (a) displaying a current page, and (b) one of all programs which can be shifted from the current page of the program displayed in the step (a). The display data of the page is before
Judge whether or not it is stored in the second memory;
The display data is read out from the first memory and stored in the second memory only when it is not read, and (c) stored in the second memory in response to a page update command.
FM that displays the display data of the corresponding page of the specified program
A display control method in a multiplex receiver.