JPH05145921A - Data transmission system - Google Patents

Abstract

PURPOSE:To provide the two kinds of different data transmission service with one data transmission system. CONSTITUTION:This system is equipped with a program data transmitter 1 for game and a character image data transmitter 2, and signals are applied to the program data for game and the character image data transmitted from the devices 1 and 2 by a code applying device 3 so as to identify the classes of the data. Concerning the program data for game and the character image data applied the identification signals, the respective data signals are multiplexed to the parts of TV signals by a frame multiplexer 4. Next, those data are modulated by an RF modulator 5 and transmitted while using the transmission line of a CATV, the program data for game or the character image data are selected at a terminal equipment 6 and a data processing is executed so as to enable the execution of the game and the display of character images.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transmission device in a CATV system.

[0002]

2. Description of the Related Art In recent years, as a data transmission method using a CATV transmission line, there is a method in which a frame multiplexer is used to multiplex and transmit data to a video signal portion of a TV signal. The method of multiplexing and sending data to the video signal portion of the television signal using the frame multiplexing device is
It is possible to send a large amount of data in a relatively short time. Conventionally, as an example of a system using a frame multiplexer, there is one as shown in FIG. The system of FIG. 6 will be described below. Reference numeral 19 denotes a game data transmission device, which inputs game program data to the frame multiplexing device 20, multiplexes the data on the video signal portion of the TV by the frame multiplexing device 20, and the RF modulator 21 for one channel of the TV. Data is transmitted using the band. Reference numeral 25 is a character image data sending device, which sends data through the frame multiplexing device 26 and the RF modulator 27, similarly to the game program data. The game program data and the modulated signal of the character image data are mixed by the mixer 22, then the signal is distributed by the distributor 23 and input to the game terminal device 24 and the character image terminal device 28. The game terminal device 24 demodulates the game program data and executes the game program to provide a service. Further, the character / image terminal device demodulates the character / image data to provide a character image service.

As described above, when services such as game program data and character image data are provided with different data types and different data processing,
In the conventional system, 2 depending on each service.
A system of grid data transmission was needed.

[0004]

As described above, the conventional two separate systems of the game program data transmission system and the character image data transmission system are
The system of the present invention aims to enable two services in one system.

[0005]

According to the present invention, there is provided a device for imparting a predetermined control signal and a data identification signal to game program data and character image data, assembling them in the same data transmission format, and transmitting the data. It is configured by a terminal device that discriminates game program data and character image data from the transmitted data by a control signal and a data identification signal, and selects and fetches arbitrary data.

[0006]

According to the data transmission system of the present invention, a data identification signal is added to two types of data, that is, game program data and character image data, and data is transmitted in the same data transmission format. The data transmission system is capable of providing two different types of data transmission services, that is, game program data and character image data.

[0007]

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 to 5. In FIG. 1, reference numeral 1 is a game program data sending device, 2 is a character image data sending device, and a code assigning device 3 is added to the game program data and character image data sent from the devices 1 and 2.
A signal is added to identify the type of data. The game program data and the character image data to which the identification signal is added are multiplexed by the frame multiplexer 4 into the video signal portion of the TV signal, and then modulated by the RF modulator 5 to be transmitted through the CATV transmission line. The data is transmitted using the terminal device 6, the game program data or the character image data is selected by the terminal device 6, data processing is performed, and the game is executed and the character image is displayed.

FIG. 2 shows the structure of a terminal device, 7 is a data demodulation circuit, 8 is game program data or character image data selected from the demodulated data by a data identification signal, and the data is stored in a memory 10. To do. The control circuit 9 controls the input of the selection signal to the data type selection circuit 8 according to the data type selection signal from the data selection input circuit 13. When the game program data is selected by the data type selection signal, the game data processing circuit 1
In step 1, the data in the data memory circuit is executed as a game program, the video and audio signals of the game are output, and when the character image data is selected, the character image data processing circuit 1
In step 2, the character image data is processed and the character image signal is output.

Next, regarding frame-multiplexed data transmission,
This will be described with reference to FIGS. 3 and 4. Frame-multiplexed data transmission is a method of data transmission using one channel of the TV transmission band, and as shown in FIG. 3, by multiplexing the data signal on the video signal portion of all fields of the TV signal, It enables high-speed data transmission of M bits / second. FIG. 4 is a diagram showing a waveform in one horizontal period of FIG. 3, in which a sync signal, a data type identification signal, a data management signal, and data are multiplexed in the order of a video signal portion of a TV.

FIG. 5 shows signals multiplexed in the video signal portion of the TV, and the signals will be described below. Sync signal 15
Is a reference signal for reproducing data, and the subsequent data reproduction is performed with reference to the timing of the synchronization signal 15. The data type identification signal 16 is a signal for identifying the game program data and the character image data. With this signal, when the data is taken into the device, the game program data or the character image data is selected, and
The data taken in by the terminal is used as a signal for determining whether to process it as game program data or character image data. The data management signal 17 is a number indicating the capacity of the data to be taken in and the order of the data, and the data is assembled and stored in a predetermined order according to this signal. The data 18 is game program data or character image data.

[0011]

As described above, according to the data transmission system of the present invention, the game program data transmission service and the character image data transmission service can be provided by one system, which simplifies the system and greatly reduces the cost. Can be down.

[Brief description of drawings]

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

FIG. 2 is a block diagram of a terminal according to an embodiment of the present invention.

FIG. 3 TV image of frame-multiplexed data transmission

FIG. 4 is a waveform of one horizontal period

FIG. 5 is a format diagram of a multiplexed signal.

FIG. 6 is a block diagram of a conventional data transmission system.

[Explanation of symbols]

 1 Game Program Data Sending Device 2 Character Image Data Sending Device 3 Code Assigning Device 4 Frame Multiplexing Device 5 RF Modulator 6 Terminal Device 7 Data Demodulating Circuit 8 Data Type Selecting Circuit 9 Control Circuit 10 Data Memory Circuit 11 Game Data Processing Circuit 12 Character image data processing circuit 13 Data selection processing circuit 14 Image switching circuit

Claims (4)

[Claims] 1. A data transmission system using a CATV system, comprising a device for transmitting a program data signal, a device for transmitting a character image data signal, and a program data signal and a character transmitted from the two devices. A data type assigning device that assigns each type of data to an image data signal and sequentially transmits a plurality of types of data, and a data signal output from the data type assigning device
A center device including an RF modulator that modulates, a circuit that demodulates an RF-modulated data signal sent from the center using a CATV transmission line, and data is selected from the demodulated data signal by a data type code. From a terminal device consisting of a data selection circuit for storing, a memory circuit for storing the selected data, a circuit for converting the data in the memory circuit into image signals as image data, and a circuit for processing the data in the memory circuit as program data Data transmission system. 2. A program data signal sending device and a character image data signal sending device each have a plurality of program data and character image data, and a data type assigning device manages the data type and data. 2. The data transmission system according to claim 1, wherein the data selection circuit of the terminal unit selects a data type and a data management signal for giving a signal. 3. The data transmission system according to claim 1, wherein the data type assigning device performs frame-multiplexed data transmission in which the data type is assigned and the data signal is multiplexed in the video signal portion of the television signal. 4. An apparatus for transmitting a program data signal,
The data transmission system according to claim 2, wherein a table of contents of the program is added to each program data.