JPH02149093A - Diagnosing vtr play back device - Google Patents

Abstract

PURPOSE:To display a black-and-white or color picture on a screen as necessary by directly outputting digital three primary chrominance signals in accordance with a control signal or outputting decolored digital three primary chrominance signals from a look-up table memory connected between a still memory and a converter. CONSTITUTION:A still memory control part 6 outputs a command for converting an image consisting of three primary chrominance signals stored in the s till memory 5 into a static image or a moving image in accordance with the 1st select signal selectively inputted from an input terminal 12, and the still memory 5 can be allowed to successively stored and read out data by the command signal. When digitized three primary red(R), green(G) and blue (B) chrominance signals of the static or moving image are outputted from the control part 6, a look-up table memory control part 6 outputs a signal obtained by decoloring colored blood flow information included in the three primary chrominance signals or a signal to be the colored blood flow information which is not decolored in accordance with the 2nd select signal inputted from the 2nd input terminal 13.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a diagnostic VTR playback device for reproducing images obtained through diagnosis for diagnosis, and particularly to image control thereof.

[Prior Art] Figure 2 shows a conventional diagnostic VTR playback device, in which (1) is a VTR that plays back a videotape of images obtained by ultrasound diagnosis, and (3) is a VTR that plays back a videotape of images obtained by ultrasound diagnosis. Standard composite video equipment signal (hereinafter referred to as composite signal) is red (R),
A color decoder that separates the three primary color signals of green (G) and blue (B), (4) is an A/D converter that converts the analog signal of the three primary color signals into a digital signal, and (5) is one screen of the display screen. Min RSG.

A still memory that stores the B signal, (6) a still memory control unit that controls the still memory (5), and (7) a D/
The A converter (8) is a CRT.

In the diagnostic VTR playback device configured as described above, as shown in FIG. 2, when a video recorded using an ultrasound diagnostic device is played back on the VTR (1),
Due to its nature, RT (8) has red (R), green (G),
Since it is possible to display only the three primary color signals of blue (B), the color decoder (2) completely converts the composite signal into three primary colors.
Separates into primary color signals red (R), green (G), and blue (B).

Next, in order to store this information in the still memory (5), it must be a digital signal, so an A/D converter (4) is required.
Convert it to a digital signal.

The converted digital signals of the three primary color signals of red (R), green (G), and blue (B) are transferred to the CRT in the still memory (5).
(8) is digitally stored, and the still memory control unit (6) controls the still memory (5) by a first selection signal selectively input from the first input terminal (12). ), it issues a command to make the image of the three primary color signals stored in the controller into a still image or moving image, or to clear it.

Next, the digital R, C; and B signals cannot be displayed on the CRT (8), so they must be converted to analog, so they are converted to analog using the D/A converter (7), and the video is transferred to the CRT (8) as needed. Or display a still image on a color screen. Therefore, the main method has been to display moving images reproduced from a VTR while optionally keeping them still.

[Problems to be Solved by the Invention] In the conventional diagnostic VTR playback device as described above, the digitized RSGSB signal is stored as it is in the still memory and output to the D/A converter. If the color signal cannot be bleached from the R, GSB signal and blood flow measurement is not necessary, the area colored by the blood flow information cannot be bleached, which is inconvenient when a black and white image is more convenient for diagnosis. There was a problem.

The present invention was made in order to solve such problems, and an object of the present invention is to provide a diagnostic VTR playback device that can arbitrarily decolorize an image colored by blood flow information and turn it into a black and white image. do.

[Means for Solving the Problems] A diagnostic VTR playback device according to the present invention includes a color decoder that separates a reproduced image obtained by diagnosis into analog three primary color signals, and a color decoder that separates a reproduced image obtained by diagnosis into analog three primary color signals, and a first converter that converts each signal into a digital signal and converts it into a digital three primary color signal, a still memory that outputs the reproduced image as it is to create a moving image or a still screen if necessary, and the still memory. and a second converter for converting the digital three primary color signals into analog signals in order to display the output of the digital three primary color signals on a CRT. It is equipped with a look-up table memory for outputting the color component signal of the signal as a digital three primary color signal as it is or outputting a bleached digital three primary color signal according to a control signal.

[Operation] In this invention, the look-up table memory placed between the still memory and the second converter outputs the digital three primary color signals as they are according to the control signal, or
Alternatively, a bleached digital three primary color signal is output.

[Embodiment] Fig. 1 is a block diagram of a VTR playback device showing an embodiment of the present invention. (1) to (8) are completely the same as the conventional example, and (9) is a look-up table. The memory control unit (10) is a lookup table memory.

In the VTR playback device configured as described above, as shown in FIG.
TR is a standard composite video signal (hereinafter referred to as composite signal) consisting of luminance signals, chromaticity signals, horizontal and vertical synchronization signals, etc. necessary for image display in order to reduce the number of cables for exchanging signals with external devices. However, this composite signal mixes all the signals required for image display due to the above-mentioned configuration, so it can be transmitted using a single cable. However, with CRT(8),
Due to its nature, it can only be displayed using the three primary color signals of red (R), green (G), and blue (B), so the color decoder (2
) completely separates the composite signal into three primary color signals, red (R), green (G), and blue (B).

Next, the composite signal is an analog signal, and even after being separated into the three primary color signals by the color decoder (3), it is still an analog signal, so in order to store this information in the still memory (5), it must be a digital signal. It is converted into a digital signal by an A/D converter (4).

The converted digital signals of the three primary color signals of red (R), green (G), and blue (B) are transferred to the CRT in the still memory (5).
This signal is sequentially stored in digitally designated addresses for one screen displayed in (8) so that it can be read out. This is because the still memory control unit (6) selects the image of the three primary color signals stored in the still memory (5) as a still image or A command is given to create a moving image, and this command signal causes the still memory (5) to drive a counter with a clock that is divided between temporally adjacent vertical signals by a number corresponding to the required resolution. Can remember and read. Here, if the still memory control unit (8) outputs the three primary color signals of red (R), green (G), and blue (B) digitized from a still image or moving image, the second input terminal ( 13), the lookup table memory control unit (9) bleaches the colored blood flow information included in the three primary color signals or does not bleach the colored blood flow information. It is output as a signal that is raw blood flow information. That is, if the color is bleached, the ratio of the three primary color signals of red (R), green (G), and blue (B) will be 1:1:1.

Next, since the digital R and GSB signals cannot be displayed on the CRT (B), they must be converted to analog, so convert them to analog with the D/A converter (7), and send the moving or still image to the CRT (8) as necessary. Displays a black and white screen or a color screen.

Further, the decolorization of this lookup table memory (lO) will be explained below.

For example, if bright red blood flow information exists in the three primary color signals (hereinafter R, GSB) input to the lookup table memory (10), when converted to a 2-bit digital RSGSB signal, (RXG, B )−'(11,00,00),
In order to bleach this bright red and make it black, if the address of the lookup table memory (10) is determined to be (110000), the data needs to be (000000). There is also green, and to make it gray,
Gray digital R, G, and B are expressed as (RSGSB) - (00, 11, 00), so if the address is (001100), the data should be (101010). . If you want to make it white again, change the data (111111
).

Furthermore, in order to output the RSG and B signals as they are to the D/A converter (7), it is sufficient to make the address and data the same. The required screen data must be stored in the look-up table memory (10) in advance, but if the threshold for determining the presence or absence of color is varied as necessary, distortion of the analog system of the VTR or A
Errors due to the characteristics of the /D converter (4) etc. can be dealt with.

Note that in the above embodiment, a lookup table memory was exemplified as a device that outputs desired data from an address in order to convert a color image into a monochrome image, but the present invention is not limited to this, and other similar functions may be used. For example, a ROM may be used to shorten the switching time.

[Effects of the Invention] As described above, according to the present invention, the lookup table memory disposed between the still memory and the second converter outputs the color component signals of the digital three primary color signals as they are according to the control signal. or bleached digital 3
Since primary color signals are output, the displayed screen can be displayed in black and white or in color as required, making it easier to diagnose when blood flow is not being measured.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing one embodiment of the present invention, and FIG.
The figure is a schematic configuration diagram of a conventional example. As shown in the figure, (1) VTR, (3) Baka 5-tecoder, (4) A/D converter, (5) still memory,
(6) is a still memory control unit, (7) is a D/A converter,
(8) is a CRT, (9) is a lookup table memory control section, and (10) is a lookup table memory. Note that the same reference numerals in the figures indicate the same or equivalent parts. Agent Patent Attorney Muneharu Sasaki

Claims (1)

[Claims] (1) A color decoder that separates the reproduced image obtained by diagnosis into analog three primary color signals, and a first color decoder that converts the analog three primary color signals separated by the color decoder into digital signals and converts them into digital three primary color signals. a converter, a still memory that outputs the reproduced image as it is to display it as a moving image or a still screen if necessary, and a digital 3 converter for displaying the output of the still memory on a CRT.
and a second converter for converting primary color signals into analog signals.
A diagnostic VTR playback comprising: a look-up memory for outputting a color component signal of a primary color signal as a digital three primary color signal as it is or outputting a bleached digital three primary color signal according to a control signal. Device.