JPH0336889A - Picture transmitter - Google Patents

Abstract

PURPOSE:To facilitate the confirmation of the operation of each of a picture transmitter by providing a memory section storing a test picture data so as to input the test picture data of a form suitable for each of the transmitter. CONSTITUTION:In the case of confirming the operation of a transmission control section 6, when a test mode selection signal is inputted from a terminal 10, a data changeover switch 9 is set to the position of a contact (d). A test use picture data memory section 11 outputs a test picture data D2 store in the same form as the data outputted from a transmission buffer section 5 to the control section 6. The data D2 is sent from a line output terminal 7 through the switch 9 and the control section 6 and reproduced into a video signal by a reception station. Moreover, in the case of confirming the operation of the system from a transmission frame memory section 3, a high efficient coding processing section 4 and a transmission buffer section 5, the data changeover switch 8 is set to the position of a contact (b) and the switch 9 is set to the position of a contact (c) and the test picture data D1 is outputted. Thus, the operation of each of the transmitter is easily confirmed.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to an image transmitting device that transmits encoded image data to a receiving station using a one-way line.

[Conventional technology]

Figure 3 shows, for example, "Mitsubishi Electric Technical Report Vol. 1.60, Nα
10. This is a simplified block diagram of an image transmission device (video codec) shown in 1986J, and in the figure, 1 is a video signal input terminal, 2 is an input signal processing unit that processes the video signal, and 3 4 is a high-efficiency encoding processing unit that encodes the stored data; 5 is a transmission buffer unit that temporarily stores the encoded data; 6 is a transmission control unit that controls temporarily stored data, and 7 is a line output terminal that outputs the controlled data. Next, the operation will be explained. A video signal inputted from a video signal input terminal 1 is separated into a luminance signal and two color difference signals by an input signal processing section 2, converted into digital data, and stored in a transmission frame memory section 3. This stored data is converted into a format suitable for encoding processing after speed conversion and the like by the transmission frame memory section 3, and then output. This output data is compressed by various encoding processes in the high-efficiency encoding processing unit 4, temporarily stored in the transmission buffer unit 5, and then output at a speed suitable for the transmission line speed. Ru. After this output data is multiplexed with various data for transmission control by the transmission control section 6, it is sent from the line output terminal 7 through a line to a receiving station (not shown). The receiving station decodes the data received from the line and outputs it as a video signal.

[Problem to be solved by the invention]

Since the conventional image transmitting device is configured as described above, it only has a process of encoding the video signal and outputting it to a one-way line, so image transmission that has an encoding/decoding process that allows transmission and reception is possible. There were problems such as it was not possible to perform a repeat test of the device and it was difficult to check the operation of each part of the device. The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an image transmitting device that allows easy confirmation of the operation of each part of the device.

[Means to solve the problem]

The image transmitting apparatus according to the present invention is provided with a memory section storing test image data in a format that can be input to each part of the apparatus, so that test image data in a format suitable for each part of the apparatus can be input.

[For use]

The image transmitting apparatus according to the present invention can determine whether or not each part of the apparatus is operating normally by selecting test image data in a format suitable for each part of the apparatus from the memory part and inputting it to each part of the apparatus.

[Embodiments of the invention]

An embodiment of the present invention will be described below. In FIG. 1, parts corresponding to those in FIG. 3 are given the same reference numerals and their explanations will be omitted. Reference numeral 11 indicates a test image data memory section in which test image data D, , D, is stored; 10 indicates a test mode selection signal input terminal input to the test Kawanishi image data memory section 11; and 8 indicates a test mode selection signal input terminal of the input signal processing section 2. A data switching switch 9 selects either the output data or the above-mentioned test Kawanishi image data D1 and inputs it into the transmission frame memory section 3. Reference numeral 9 indicates either the output data of the transmission buffer section 5 or the test image data D. This is a data changeover switch that selects one and inputs it to the transmission control unit 6. Note that the data changeover switch 8.9 and the test mode selection signal input terminal 10 constitute manual selection means. Next, the operation will be explained. In the normal operation mode, the data selector switch 8 is set to the contact A side, and the data selector switch 9 is set to the contact C side, and the video signal input from the video signal input terminal l is connected to the line as in the conventional example described above. It is sent out from output terminal 7. When testing the operation of each part, a test mode selection signal is input from the test mode selection signal input terminal 10 to select which part is to be tested for operation. For example, when checking the operation of the transmission control unit 6, when a test mode selection signal to that effect is input, the data changeover switch 9 is set to the contact d side. The test Kawanishi image data memory unit 11 stores in advance test Kawanishi image data D1. In an example of a test mode in which Dt is stored and the operation of the transmission control section 6 is checked, this test image data memory section II is stored in the transmission buffer section 5.
outputs test Kawanishi image data Dr that has been converted into the same format as the output data output to the transmission control unit 6 and is stored. This test Kawanishi image data D2 is the data changeover switch 9.
The signal passes through the transmission control section 6, is sent out from the line output terminal 7, is received by the receiving station via the line, and is reproduced as a video signal. The operation of the transmission control unit 6 can be confirmed through the above steps. In addition, when checking the operation of the system from the transmission frame memory section 3 to the high-efficiency encoding processing section 4 and transmission buffer section 5, input a test mode selection signal to that effect from the test mode selection signal input terminal 10. , the data changeover switch 8 is set to the contact side, and the data changeover switch 9 is set to the contact C side. Along with this, the test Kawanishi image data memory section 11
outputs test image data D1 in the same format as the output data of the input signal processing section 2. This test west image data D,
is input to the transmission frame memory unit 3, then processed by each subsequent stage unit, output from the line output terminal 7, and reproduced as a video signal at the receiving station. Through the above steps, it is possible to determine whether or not the system for performing the operation check is malfunctioning. Although the above embodiment has been described on the premise that there is a receiving station that operates normally, the arrangement may be as shown in FIG. 2. In FIG. 2, a data changeover switch 12 is provided upstream of the line output terminal 7, and is set to contact f when operation 61 is confirmed. Also, the transmission control section 6
A line output data comparator 13 is provided in which line output data, which is the output of , is input, and line output data during normal operation is stored. In this line output data comparison section 13, the test west image data memory section 1
By comparing the line output data obtained from the first test Kawanishi image data D1 or D2 with the line output data during normal operation, it is possible to perform an operation confirmation test using only the image transmitting apparatus.

【Effect of the invention】

As described above, according to the present invention, each part of the image transmitting apparatus is provided with a memory part storing test image data that can be input, and is configured to be able to input data to each part. This has the effect of making it easier to perform operation confirmation tests.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an image transmitting device according to one embodiment of the present invention, FIG. 2 is a block diagram showing an image transmitting device according to another embodiment of the present invention, and FIG. 3 is a block diagram showing a conventional image transmitting device. It is a block diagram. 1 is a video signal input terminal, 2 is an input signal processing section, 3 is a transmission frame memory section, 4 is a high efficiency encoding processing section, 5 is a transmission buffer section, 6 is a transmission control section, 7 is a line output terminal, 8
．． 9 is a data selection switch, IO is a test mode selection signal input terminal, and 11 is a test image data memory section. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] an input signal processing section to which a video signal is input; a storage section for storing output data of the input signal processing section; a high-efficiency encoding processing section to which data read from the storage section is input; A transmission buffer section to which the output data of the encoding processing section is input, a transmission control section to which the output data of the transmission buffer section is input, and a test in the same format as the data input to a predetermined section of the above sections. a test image data memory section in which test image data is stored, and selection input means for selecting desired test image data from the test image data memory section and inputting it to a corresponding section of the respective sections. image transmitting device.