JPS58115991A - Signal processor using digital correlation device - Google Patents

Abstract

PURPOSE:To process signals requiring a broad frequency band such as video signals on real time digitally, to convert a video signal synchronizingly separated into a n-bit parallel digital signal at an A-D converter, to process picture at one or more digital correlating device groups per one bit, to convert the picture into an analog signal again at a D-A converter and to output the analog signal in addition with a synchronizing signal. CONSTITUTION:The analog signal H1 is inputted to two A-D converters. The A-D converter 1H2 is driven with a clock 1H4 and the A-D converter 2H3 converts the signal into a digital signal with a clock 2H5 delayed by a half period from the clock 1 and the digital signal is processed at a digital correlating device. A full adder group H6 is connected between the digital correlating device groups 1, 2 to double the resolution and accuracy.

Description

[Detailed description of the invention] This invention is shown in FIG. Video signal as described High-speed image processing equipment using use Figure A is high-speed image processing The block diagram of vinegar. Period-separated video transmission No. A5 with A-D converter A1 n-bit parallel digital (high speed comparator method) and one or more bits per bit. Image with digital correlator group A2 processing, D-A converter A Analog signal again using 3 Correct to A6 and add sync signal Output to monitor. code origination Generator A4 is a digital correlator group perform convolution with A binary sequence is provided for this purpose.

Clock A7 is an A-D converter and drives the digital correlator group. , can be used from 0 to 20MHz Ru.

Figure 2 shows one bit per bit. When connecting a digital correlator , 7 bits of digital correlator The output of In order to connect to the full adder group, Garu. Most significant digit (MSD) B 1, MSD digital Correlator B'2 uses a filter to multiply by 2n-1. Connect to the lure adder group B3 and The adder output B4 is 2x'n bit Become a hit.

Figure 3 shows the inside of the digital correlator. Show part. data register C 1 and the clock that drives it It is A. The data register is There are 64 bits, each bit 2 input exclusive input to one side of AC2, and One is reference register C5 Record the binary series of “0” or “1” of Memorized reference latch C 4 enters. Exclue The output of Shiv Noah is and times Enter Road C3 and go to Mask Regis. Multiply according to the state of data C6 Decide what to do. Ma In addition, the reference register and The clock that drives the mask register Locks B and M are the same is simple. data register clock A that operates the Digi using Clock S Talsummer C7 is Ixkul - Integrate the result of Siv Noah 7-bit parallel digital signal Output on C8.

Figure 4 shows the digital Tal correlator and full adder group Diagram showing in detail how to connect It is. Digital correlator is 4 In order to weight twice as much, 2 Connect to input full adder D2 , full adder output D3 is D- Convert to analog signal with A converter exchange.

Figure 5 shows the digital correlator Convolution used Shows a row of . In general, V1( t) and V2(t) (cross-correlation) is according to the mathematical formula It is expressed as However, T0: the period of the function term, Also, the convolution of V1(t) and V2(t) is It is expressed as It is also shown as follows. I will be forgotten.

However, h(t) is the system input Shows pulse response.

Correlation and convolution To calculate digitally, Seki is It is expressed as Also convolution The tion is becomes, correlation and convolution The sign of K is different from tion. After that they are exactly the same.

In fact, a digital correlator run the evolution is the binary system corresponding to h(t) column is in reference register is input to the reference label. memorize it by touching it. mask cash register Star E2 is all 1, 10 bits Allow multiplication by . V(t) The data corresponding to Clock to the right in the register E4 Shift every time. This example is L in n-bit digital Digital correlation connected to SD V(t) is 6 bits in series. Input of point 1 (rectangle of size 1 wave), convolutus The formula for the become. However, sgn ( ) is 0 or It is a binary function of 1 or 1. K is the number of bits in the data register , n is mask register enable becomes the number of bits. clock 3 Well then clock 8 is become. Therefore, Ixkul - Synthesis with the function of Shiv Noah Measured value E5 is shown.

Figure 6 shows a square wave of V(t) , Figure 7 shows the real-time convoli This is the waveform that was Ru. Good response in high frequency range of the low-pass filter that becomes Shows output waveform G1 and masks Set registers to 1 from 3 to 8. When n=6, the role of h(t) Reference cash register Everything in the star becomes 1. in Pulse response has poor high-frequency characteristics The output waveform G2 shown in FIG. now Control for 1 bit up to volume of all bits Exactly the same with digital correlator When done, n-bit signal processing Processing equipment (digital hardware) convolver).

Figure 8 shows high resolution and high precision. This is a highly advanced signal processing method. a The analog signal H1 has two A- Input to D converter. A-D Converter 1H2 clock 1H 4, A-D converter 2 H3 is half a cycle from clock 1 Digi with delayed clock 2H5 digital correlation Execute signal processing with a group of instruments.

Full adder group H6 is digital By connecting correlator groups 1 and 2 doubles the resolution and precision improve to

[Brief explanation of drawings]

Figure 1 shows the video signal. The high-speed image processing device used is shown below. The configuration explanatory diagram, Figure 2, is digital correlator per bit Digital correlation group using one Figure 3 is digital Diagram showing the inside of the correlator, No. 4 The figure shows the output of the digital correlator group. To apply a certain weight to the force , diagram connecting to full adder, Figure 5 shows a digital correlator. perform convolution Figure 6 shows an example of in order to carry out the involution Figure showing the waveform input to Figure 7 shows convolution Figure 8 shows the waveform obtained by provides high-resolution, high-precision Diagram showing the code processing device Applicant: Kei Kato■

Claims (1)

[Claims] n bit from computer Digital data and analog In the case of a digital signal, an A-D converter using n-bit digital Each bit converted to a digital Connect the Tal correlator. de The digital correlator has a 7-bit phase Output the related results. least significant digit Digital connected to (LSD) For the output bits of the correlator 20 times the next bit of digital 21 times the output of the correlator , and the n-bit correlation output is to give a weight of 2n-1 times , bordering the full adder group. subordinate So, the output of the full adder group is It becomes 2xn bits. this through the interface input into the computer. Ma Or use a D-A converter to convert analog Return to Google. digital correlator To perform signal processing using , real-time digital control Volume (superposition of It is the same as calculating the integral be. This digital correlator Internally, the time series of input bits is data register, Specifies the number of bits to perform correlation. mask register, signal 2 of “0” or “1” used for processing Reference that the value series enters register and accumulate this Latch, perform two new method multiplications Exclusive Noah, Ai A digital sensor that integrates the Consists of mer. Digital Collaborate using a correlator How to do the process a mask that specifies the number of bits to Memorize registers and binary sequences or in the reference register. impulses showing different transfer characteristics. response and respond to all bits. and do the same, digital hard convolver is a method and apparatus for configuring . Additionally, if you run it this way The signal processing time is mainly due to data Bits are transferred within a register. depends on clock speed. Lock cycle and data register The time multiplied by the number of bits of data It's real time.