JPH04282987A - Image data signal transmission device - Google Patents

Abstract

PURPOSE:To send a display data and a horizontal synchronizing signal and a vertical synchronizing signal forming a digital picture data signal through one cable. CONSTITUTION:A digital display data signal S1 is inputted to a space insert section, a space signal S2, an insert display data signal S3 outputted from the insert section and a data length S4 for horizontal and vertical period outputted from a horizontal vertical data register are inputted to a horizontal vertical mark signal generating section, from which a digital picture data signal is outputted in a transmitter T. Moreover, the digital picture data signal is inputted to a mark signal count section, while a horizontal synchronizing signal and a vertical synchronizing signal are outputted, a space signal insert display data signal outputted while a mark signal is eliminated is inputted to a space signal elimination section, in which the space signal is eliminated and a display displaying data signal is outputted in a receiver R.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for transmitting digitized image data signals over a single cable.

0002

[Prior Art] Conventionally, when transmitting a digitized image data signal, three cables were required to transmit display data, a horizontal synchronization signal, and a vertical synchronization signal that constitute the digitized image data signal. Ta.

0003

SUMMARY OF THE INVENTION An object of the present invention is to provide display data that constitutes a digitized image data signal,
An object of the present invention is to provide an image data signal transmission device using a transmitting device, a receiving device, or a transmitting/receiving device capable of transmitting a horizontal synchronizing signal and a vertical synchronizing signal using one cable.

0004

[Means for Solving the Problems] In order to achieve the above object, a first device of the present invention is a device for transmitting a digitized image data signal through a single cable as shown in FIG. A space signal insertion section A1 that inputs a display data signal S1, counts the number of mark signals, and outputs a display data signal S3 in which a space signal S2 is inserted at every fixed mark length, and this space signal insertion section A1.
The space signal insertion display data signal S3 outputted from the display data signal S3 and the horizontal and vertical period data length S4 are inputted to generate a mark signal for identifying horizontal and vertical synchronization signals having a certain mark length or more of the display data signal S3. A horizontal and vertical mark signal generating section A2 outputting an image data signal S5, and a data length S of horizontal and vertical periods are provided to this generating section A2.
The present invention is characterized in that it uses a transmitter T comprising horizontal and vertical data length registers A3 that output 4.

In order to achieve the same object, a second device of the present invention is a device for transmitting a digitized image data signal through a single cable as shown in FIG. , counts the mark signals, outputs the horizontal and vertical synchronizing signals S4, and at the same time deletes the mark signals for identification and generates the space signal S2.
A mark signal counting section B1 outputs a display data signal S3 inserted with a .
2 and outputs a digital display data signal S1.

A third apparatus of the present invention is characterized in that it uses a transmitting apparatus T according to claim 1 and a receiving apparatus R according to claim 2, as shown in FIG. 1, in order to achieve the same object.

[0007]

[Operation] In the first device, the digital display data signal S
1 is input to the space signal inserting section A1, the number of mark signals is counted, and a display data signal S3 in which a space signal S2 is inserted at every fixed mark length is outputted from the space signal inserting section A1. This display data signal S3 and the data length S4 of the horizontal and vertical periods are input to the horizontal and vertical mark signal generating section A2, and a mark signal for identifying horizontal and vertical synchronization signals having a predetermined mark length or more of the display data signal S3 is generated. A digital image data signal S5 consisting of a display data signal S3 and horizontal and vertical synchronizing signals is outputted from the horizontal and vertical mark signal generating section A2 and transmitted.

In the second device, the digital image data signal S5 is input to the mark signal counting section B1, the mark signals are counted, and the horizontal and vertical synchronizing signals S4 are outputted from the mark signal counting section B1 for simultaneous identification. A display data signal S3 in which the mark signal is deleted and a space signal S2 is inserted is output. The space signal insertion display data signal S3 output from the counting section B1 is input to the space signal deletion section B2, and the space signal S2 is inputted to the space signal deletion section B2.
is deleted, and from this the digital display data signal S1
will be output.

[0009] In the third device, the first device and the second
The device will allow digital image data signals to be transmitted and received over a single cable.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing the structure of a first embodiment of an apparatus according to the present invention. A1 is digital display data signal S
1, counts the number of mark signals, and outputs a display data signal S3 in which a space signal S2 is inserted every certain mark length, for example, every 6 bits;
2 inputs the space signal insertion display data S3 output from the insertion section A1 and the horizontal and vertical period data length S4, and generates horizontal and vertical synchronization signals of a certain mark length or more, for example, 7 bits or more, of the display data signal S3. A mark signal for identification is generated and a digital image data signal S5 is generated.
The horizontal and vertical mark signal generating section A3 that outputs the horizontal and vertical mark signal generating section A3 is a horizontal and vertical data length register that outputs the data length S4 of the horizontal and vertical periods to the generating section A2. The transmitter T includes a space signal inserter A1, a horizontal and vertical mark signal generator A2, and a horizontal and vertical data length register A3.

B1 is a display data signal in which a digital image data signal S5 is input, its mark signals are counted, horizontal and vertical synchronizing signals S4 are output, and at the same time mark signals for identification are deleted and a space signal S2 is inserted. B2 is the space signal insertion display data signal S3 outputted from this counting section B1.
This is a space signal deletion section which inputs the space signal S2, deletes the space signal S2, and outputs the digital display data signal S1. The receiving device R consists of a mark signal counting section B1 and a space signal deletion section.

In the above configuration, the digital display data signal S1 (see FIG. 2(a)) is input to the space signal insertion section A1, the number of mark signals is counted, and the space signal S2 (see FIG. (see 2(b))
Display data signal S3 with 1 bit inserted (Figure 2(b)
) is output from this space signal insertion section A1. This display data signal S3 and the horizontal and vertical cycle data length S4 (see FIG. 2(c)) are input to the horizontal and vertical mark signal generation section A2, and the data length S4 (see FIG. 2(c)) is inputted to the horizontal and vertical mark signal generating section A2. A mark signal is generated to identify the 8-bit and 15-bit horizontal and vertical synchronization signals, and the display data signal S3 and the horizontal and vertical synchronization signals (Fig. 2
A digital image data signal S5 (see FIG. 2(d)) consisting of a horizontal synchronizing signal (in FIG. 2(c)) is outputted from the horizontal and vertical mark signal generating section A2 and transmitted.

Digital image data signal S5 (FIG. 2(
d)) is input to the mark signal counting section B1, the mark signal is counted, and the horizontal,
At the same time as the vertical synchronization signal S4 (FIG. 2(e) shows the horizontal synchronization signal) is output, the mark signal for identification is deleted and the display data signal is inserted with the space signal S2 (see FIG. 2(f)). S3 (see FIG. 2(f)) is output. The space signal insertion display data signal S3 outputted from the counting section B1 is input to the space signal deletion section B2, where the space signal S2 is deleted, and the digital display data signal S1 (see FIG. 2(g)) is outputted from this. It turns out. In this way, the digital image data signal is transmitted by the transmitting device T and the receiving device R through one cable,
can be received.

[0014]

As described above, according to the present invention, the display data signal and the horizontal and vertical synchronization signals constituting the digitized image data signal can be transmitted using one cable, and the A transmitting device, a receiving device, or a transmitting/receiving device can be provided.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of one embodiment of the device of the present invention.

FIG. 2 is a time chart for explaining the operation of one embodiment.

[Explanation of symbols]

S1 Digital display data signal S2 Space signal S3 Space signal insertion display data signal S4
Horizontal and vertical period data length S5 Digital image data signal A1 Space signal insertion section A2 Horizontal and vertical mark signal generation section A3 Horizontal and vertical data length register B1 Mark signal counting section B2 Space signal deletion section T Transmitting device R Receiving device

Claims (3)

[Claims] Claim 1: In a device that transmits a digitized image data signal through a single cable, a digital display data signal (S1) is input, the number of mark signals is counted, and a space signal (S2) is transmitted every certain mark length. ), and a space signal inserting section (A1) that outputs a display data signal (S3) into which a space signal inserting section (A1) outputs a display data signal (S3), and a space signal inserting display data signal (S3) output from this space signal inserting section (A1) and the data length of horizontal and vertical periods. (S4) is input to generate a mark signal for identifying horizontal and vertical synchronization signals having a certain mark length or more of the display data signal (S3), and outputs a digital image data signal (S5). An image characterized by using a transmitting device T consisting of a generating section (A2) and a horizontal and vertical data length register (A3) that outputs horizontal and vertical cycle data lengths (S4) to the generating section (A2). Data signal transmission equipment. Claim 2: A device for transmitting a digital image data signal through a single cable, which inputs a digital image data signal (S5), counts its mark signals, and generates horizontal and vertical synchronization signals (S4). At the same time as outputting, the mark signal for identification is deleted and a space signal (
A mark signal counting section (B1) outputs a display data signal (S3) into which a space signal insertion display data signal (S2) is inserted, and a space signal (S2) is input by inputting a space signal insertion display data signal (S3) outputted from this counting section (B1). 1. An image data signal transmitting device characterized in that it uses a space signal deletion section (B2) for deleting a digital display data signal (S1) and outputting a digital display data signal (S1), and a reception device (R). [Claim 3] The transmitting device (T) of claim 1 and claim 2
An image data signal transmission device characterized in that it uses a receiving device (R).