JPS63161764A - Teletext receiver - Google Patents

Abstract

PURPOSE:To solve a waiting time in case of selecting a program from repeated programs by reading out the contents of a program number reservation memory with the contents of a reception channel identification memory and a reservation key which is arranged on a remote control transmitter. CONSTITUTION:A titled receiver provides a buffer memory 9 which updates packet data, most formerly written, with incorporated data at the current time, the reception channel identification memory 10 which identifies a reception channel at the current time, the program number reservation memory 11 with the nonvolatile memory and a single operation key and a reservation key for selecting the number of plural reserved programs, which are provided on the remote control transmitter. Therefore the waiting time is solved and by operating the single key of a small number of program number selection reserving keys, a program which is often watched can be selected every channel so as to be useful.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a teletext receiver equipped with a remote control for program reservations.

2. Description of the Related Art In recent years, text multiplex broadcasting has been used in which text signals are multiplexed and broadcast during the horizontal scanning period within the vertical retrace period of television broadcasting. Teletext broadcasting is basically based on a repetitive format in which data for a program or each page that makes up the program is selected at intervals approximately equal to the viewing time of each page.

For non-batch type programs, the selection side selects each page data of the program page by page considering the page presentation timing, and the receiver side sequentially presents the program or page specified by the user as soon as it is received. I am trying to process it.

For batch-type programs, presentation processing is performed after receiving all page data according to the user's access. In general, for repetitive non-batch-type programs, the program or the page containing the program is displayed after about 20 seconds. It is being sent out. Therefore, even if the user specifies only a program to receive, in the worst case, the presentation process will not be processed for about 20 seconds, resulting in a so-called waiting time. In order to eliminate this waiting time, conventionally, by having a memory called page memory and reserving the program you want to watch,
It is now possible to play reserved programs without waiting.

Problems to be Solved by the Invention However, in the conventional page-memory system, when a program that has not been reserved is accessed, in the worst case, a waiting time of about 20g- will occur. Teletext program selection is done by key operation, and generally when specifying a program, the program number is 3 digits and the program input function is # (Igeta).
, which requires multiple key operations. For example, even if a user always wants to watch a specific program on a certain station, the user always has to operate multiple keys, resulting in very poor operability.

In view of the above-mentioned problems, the present invention aims to eliminate the waiting time when selecting a program from a repeated program, and provides a teletext broadcasting receiver that allows access to frequently viewed teletext programs to be performed by a single key operation. It is something.

Means for Solving the Problems In order to solve the above-mentioned problems, the teletext receiver of the present invention has a teletext receiver that receives four horizontal periods (14
A buffer memory that stores information pits for each horizontal period after extracting and error-correcting character multiplex signals (M, 15H, 16H, 21H), and a reception channel identification memory that stores data indicating the channel from the remote control. , a program number reservation memory in non-volatile memory for allowing the user to set and hold the teletext program number he or she wishes to receive with a single key operation, and one key out of one or more keys arranged on the remote control. (hereinafter referred to as the reserved program number key) is pressed and the code selected by the remote controller and the contents of the above-mentioned receiving channel identification memory are used to write and read a program number to a specific address in this program number reserved memory. and a teletext receiving decoder.

According to the present invention, with the above-described configuration, error-corrected data is always stored and updated in the buffer memory, and the capacity of the buffer memory is set to about 20 seconds of teletext data for 4 horizontal periods. For example, programs that are repeatedly selected during that time can be presented without waiting time depending on the user's program selection. By pressing the contents of the reception channel identification memory and the program number reservation key located on the remote control, the contents of the program number reservation memory written and maintained by the user in advance are read out, and a specific program is operated with a single key. The presentation can be processed with no waiting time,
Program selection can also be performed with ease of operation using a single key.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings. The figure shows a block diagram in one embodiment of the invention. Reference numeral 1 denotes a television reception demodulation section, which includes a tuner, a video intermediate frequency amplification circuit, and a detection circuit. Reference numeral 2 denotes a character signal separation circuit which extracts a character signal from the section where the character signal is superimposed during the vertical blanking period and converts it into a binary signal. 3 is (27
2, 1so) code-based error correction circuit; 4 is a CPU (microcomputer) that decodes character signals;
Department. 6 is a character signal presentation processing section consisting of a display clock generation, display control circuit, character generator, and display memory. 6 is an additional sound processing unit that decodes the additional sound;
Reference numeral 7 denotes a remote control receiving section that receives signals sent from the remote controller and decodes which key is pressed. 8 sends the data decoded by the remote control receiving unit 7 to the CPU unit 4.
This is a remote control interface section for communicating with.

9 is a buffer memory using dynamic RAM, approximately 1
It has a capacity of 60 bytes. 1o is a reception channel identification memory and has a capacity of 1 byte.

11 is a program number reservation memory, which is backed up by a rechargeable battery.

The operation of the teletext receiver configured as described above will be explained. An error correction circuit 3 corrects errors on the transmission path of character signals sent every vertical retrace period. Interrupt signal 0 to CPU4 at the same time as correction is completed
to occur.

The CPU 4 processes the data fetching processing routine by the interruption, and fetches each packet data superimposed in each horizontal period into the buffer memory 9. In the capture processing routine, the oldest captured address in the buffer memory 9 is managed, and the latest packet data is written to that address area and updated, and the management address is also updated. The buffer memory 9 always stores 4H (horizontal period) data for 2Q seconds going back from the current time.Of course, this is after 20 seconds have passed since the channel was selected.Receive the remote control. The unit 7 decodes the signal from the remote control transmitter 20o and inputs various keys related to the selected channel and teletext, such as #.
(Igeta), rice (asterisk), 〉 (forward), etc. are received, the remote control code is transferred to the remote control interface section 8. The remote control interface 8 generates an interrupt signal P every time it receives a transfer. When an interrupt occurs, the CPU 4 processes the remote control processing routine, and when it is the reception channel code, the CPU 4 stores the reception channel identification memory 10.
Update. A remote control code buffer area is provided in the work RAM area of the CPU section 4, and up to 113 codes are always held starting from the present time. When a user wants to reserve a program number, he performs the same operation as for normal character program selection (inputting the program number and #), and the program is presented on the cathode ray tube.

Next, keys such as character 1 and character 2 placed on the remote control transmitter 2oo are pressed, and while being pressed further, the reservation key placed on the remote control transmitter 200 is double pressed. CPU
Part 4 is a remote control processing routine, when a reserved remote control code is detected by double pressing of the reserved key and keys such as character 1 and character 2, character 1 is extracted from the remote control code buffer area.
, the character 2 code, the # (Igeta) code buffered before that, and the numeric code existing before that, and detect the program number reservation memory 11 based on the value in the reception channel identification memory 10. Go to write the program number in the area previously allocated above.

When a key such as character 1 or character 2 is pressed and the code is detected, the reception channel identification memory 10 at that time
Program number reservation memory 1 is set using the above value and its code.
Calculate the allocated area on 1, read the program number, and sequentially read the latest packet data of the program number.
Read from the buffer memory 9 and perform decoding processing,
The character signal presentation processing unit 5 and the additional sound processing unit 6 perform screen presentation processing and additional sound performance. Therefore, programs can be easily called up with a single key operation, and unlike the conventional reservation memory one-type system, reserved programs can be easily called up with a single key operation. Even if a program other than the above is specified using normal operations, the presentation process is performed in a short time, resulting in a teletext receiver with no waiting time. A buffer memory that updates Kerato data with the currently captured data, a reception channel identification memory that identifies the current reception channel, a program number reservation memory using non-volatile memory, and a character 1 provided on the remote control transmitter.
By providing a single operation key for selecting a reserved program number such as , character 2, etc., and a reservation key, waiting time can be eliminated and frequently viewed programs can be performed across all channels by a single key operation of a small number of program number selection reservation keys. It is possible and useful.

[Brief explanation of the drawing]

The figure is a block diagram of a teletext broadcasting receiver in one practical example of the present invention.

Claims (1)

[Claims] A buffer memory that updates and buffers the packet data of the character signal multiplex horizontal period within the vertical retrace period, starting with the oldest data, and a reception channel identification memory that stores data indicating the channel currently being received from the remote control. A program number reservation non-volatile memory that allows the user to set and hold the program number of the teletext broadcast that the user wants to receive with a single key operation, and a program number reservation non-volatile memory that allows the user to set and hold the program number of the teletext broadcast that the user wants to receive with a single key operation, and a plurality of reserved programs arranged on the remote control transmitter. Equipped with means for writing and reading by number keys and reservation keys, it allows character programs to be presented over all channels without waiting time with a single key operation, and also allows users to display arbitrary repeated characters with normal key operations. A teletext broadcasting receiver characterized in that multiplexed programs are presented and processed without waiting time.