KR0119853Y1 - Tv scanning line assignment apparatus - Google Patents

Abstract

The present invention relates to a scanning line double speed technique for reducing defects such as flicker generated when displaying a large screen using a perturbation signal in an image signal processor. First, input data (DATA _in ) using a first-in, first-out (1) 31 ) And outputs the output data of the first-in first-out first one (31) by one line using the first-in first-out (2) 32 of the next stage, and through the interpolation filter (33) The interpolation is performed using data and one line delayed data, and the multiplexer 34 alternately selects and outputs the interpolated feature data and doubled data or double and one line delayed data.

Description

TV Scanning Speeding Device

1 is a block diagram of a conventional TV scanning line speed distribution apparatus.

2 is a (a) to (g) is a waveform diagram of each part of FIG.

Figure 3 is a block diagram of an embodiment of the present invention a TV scanning ship speeding device.

(A)-(h) of FIG. 4 are the waveform diagrams of each part of FIG.

5 is another exemplary block diagram of a multiplexer in FIG.

* Explanation of symbols for main parts of the drawings

31: First-in, first-out 1 32: First-in, first-out 2

33: interpolation filter 34: multiplexer

The present invention relates to a scanning line double speed technology for reducing defects such as flicker generated when displaying a large screen using an interlace signal in an image signal processor, and in particular, to reduce memory capacity by changing the double speed and interpolation order. The present invention relates to a TV scanning speed distribution system that is suitable.

In general, in order to reduce the drawbacks of the hit TV signal, a line doubler is used to convert to a progressive signal. Although there are various implementations of the line doubler, a typical example using line memory without using field memory is provided. As shown in FIG. 1, the operation thereof will be described with reference to FIG.

First, the input data DATA _{in as} shown _in FIG. 2A is input to the first-in first-out machine 11 at the front end, and the frequency of the input / output clock of the first-in first-out machine 11 is input data DATA _in . When the same frequency signal f _H as the frequency of is supplied and both the write reset signal and the read reset signal of the first-in-first-out unit 11 are supplied in line units, the input data DATA _in is delayed by one line. From this, a signal as shown in FIG. 2A is output.

In addition, the data delayed by one line through the input data DATA _in and the first- _in- first-out 11 are interpolated by the interpolation filter 12 to output a signal as shown in FIG.

The line multiplier 13 performs a function of doubling the number of scanning lines, and for this purpose, the output speed is twice as fast as that of data input, and performing this function is the first-in, first-out (13A), (13B). )to be.

That is, the line drainers 13A and 13B receive the input data DATA _in and the output data of the interpolation filter 12, respectively, and are output at twice the speed as shown in FIG. To this end, the input clock signals of the line drainers 13A and 13B are supplied to f _H , and the output clock signal is supplied to 2f _{H, which} is twice as fast as the input clock signal f _H. In addition, if the reclock signal is supplied twice when the write reset signal is supplied once, the input line is repeated twice during the same period.

On the other hand, the signal doubled through the first-in first-out (13A), (13B) of the line drainer 13 is supplied to the input of the multiplexer (14), and at this time, the By alternately selecting the inputs using a selection signal such as), output data DATA _out interpolated as shown in FIG.

However, since the original signal and the interpolated signal are doubled at the rear end after performing the interpolation in the conventional TV scanning line speed distribution apparatus, there is a defect that the cost is increased by using three line memories.

Accordingly, an object of the present invention is to provide a speed distribution apparatus for performing interpolation after first performing a double speed in order to reduce the number of use of the line memory in double speed output of the TV scan line.

The third turning first-in-first-out to, and output the double speed or the input data (DATA _in) processed as a block of the subject innovation TV scanning line double-speed device for achieving the above object is also shown this election group 1 31, wherein the first-in-first-out First-in-first-out 2 (32) for delaying the output data of the first-in first-out (31) line and interpolated inter-line by receiving data output from the first-in first-out (31) and first-in first-out (2) 32. It is composed of an interpolation filter 33 for generating an output, and a multiplexer 34 for alternately receiving and outputting the output data of the first-in, first-out first-employee 2 32 and the output data of the interpolation filter 33. When described in detail with reference to Figures 4 and 5 attached to the operation and effects of the subject innovation.

Input data DATA _in as shown in (c) of FIG. 4 is immediately stored in the first-in, first-out first-first (31), and the same line is repeated as shown in (d) of FIG. 4 by various control signals inputted at this time. The double speed data A is outputted. That is, the frequency of the write clock signal f _H of the first-in, first-out first use 31 used as the line memory is the same as the frequency used for the input of the input data DATA _in and the read clock signal 2f _{H of the first} clock. The frequency of the light clock signal f _H is twice the frequency of the light clock signal f _H. In addition, as shown in (a) and (b) of FIG. 4, the period of the write reset signal WRST of the first-in, first-out 1st 31 is the line period of the write data, and the period of the read reset signal RRST is It corresponds to half of the write reset signal WRST period.

The first-in-first-out machine 1 (31) is supplied to the first-in, first-out machine 2 (32) of the next stage of the data A which is processed at double speed and outputted. As shown in (e) of FIG. 4, a write reset signal WRST, a read reset signal RRST, a write clock signal WCLK, and a read clock signal RCLK are output to the first-in, first-out (1). Use the same signal as in 31).

The data output from the first-in first-out (31) and the first-in first-out (2) 32 are input to the interpolation filter 33 with a time difference of one line, and then interpolated as shown in FIG. It is supplied to the input of

In addition, the multiplexer 34 receives the actual line data output from the first-in first-out (2) 32 and the interpolated data from the interpolation filter 33 and receives a selection signal as shown in FIG. MUXSEL) selects the two data alternately and finally outputs the output data DATA _{out as} shown in FIG.

Meanwhile, FIG. 5 illustrates another embodiment of the multiplexer 34 in FIG. 3, and unlike FIG. 3, the first-in, first-out first unit 1 does not use the output of the first-in, first-out unit 32. An output of (31) was used as an input, and in this case, the same effect as in FIG. 3 can be obtained.

As described in detail above, the present invention has the effect of reducing the memory capacity by reducing the memory capacity by performing double speed and then interpolation when displaying a large screen using a perturbation signal.

Claims (2)

First-in-first-out 1 (31) for double-speed processing of input data (DATA _in ), first-in, first-out (2) 32 for delaying the output data of the first-in-first-out (1) 31 by one line, and the first-in first-out An interpolation filter 33 for receiving interpolation output between lines by receiving data output from the first selector 1 and the first in first selector 2 32, and the output data and the interpolation filter of the first in first selector 2 32 ( 33. A TV scanning speed distribution apparatus, comprising: a multiplexer (34) for receiving and outputting the output data of (33). The apparatus of claim 1, wherein the multiplexer (34) is configured to alternately receive the output data of the first-in first-out (1) and the output data of the interpolation filter (33).