ltpd sampling

The main sampling formats are YCbCr, and YCbCr. YCbCr is commonly used. It means that each vertex stores an 8-bit brightness value (that is, the Y value), and each 2x2 points stores a Cr and CB value, the image does not feel much changed to the naked eye. Therefore, the original RGB (R, G, and B are all 8bit unsigned) models, 4 points require 8x3 = 24 bites (such as the first figure ). now, we only need 8 + (8/4) + (8/4) = 12 bites, and each point occ

The field of sample survey involves how to get samples in an effective way. These surveys use questionnaires, and the design of questionnaires is very knowledgeable. It designs how to use words, the order of problems and the choice and combination of problems, etc. Involving psychology, sociology and other knowledge. The language of the problem should be adapted to the level of literacy of the respondents. One of the purposes of the survey design is to ensure that the sample is representative to

Super Sampling anti-aliasingSSAA is a relatively expensive one in many anti-aliasing algorithms, the age is relatively long, but the method is relatively simple,The main two-step1. Find edges2. Blur edgesThis is a post processing processing method,Then we'll see how it's going to come trueFind Edgesthe reason for finding edges is also because of the reduced consumption, so that you can only super-sample at the edges, and you do not have to sample the

For N samples, how can we take M samples uniformly and randomly? That is, each of the N samples can have a probability of M/N being taken. 1. Simple insert sampling This is the most basic and intuitive method. Insert 1 ~ in an initially empty set ~ A random integer of n. The number is M. However, this method has a weakness: When you want to insert a number, you can determine whether the number exists in the set. If it exists, you need to continue

This article was originally written by Guan Haitao. The original author has all rights reserved. For more information, see the source.As an industrial chip, ADC sampling is a very important peripheral. Stm32 integrates three 12-bit, 18-channel internal ADC, with a maximum speed of 1 microsecond. Combined with DMA, it can free up the CPU for better processing.Other logic functions on the ADC interface include:● Synchronous

Part of the Adaptive Execution plan, part of the adaptive statistics. Notice here,Adaptive plans– was changed from default plan to adaptive plan the first time it was executed.Automatic re-optimization-it was at the second execution.Statistics Feedback formerly called cardinality FeedbackDynamic Statistics formerly called Dynamic samplingSQL Plan directives (SPD) so far as 12.1, you can think of the persistence of dynamic sampling Well, the topic we

How to Select k elements from n elements with equal probability? This problem is a reservoir sampling. The algorithm can be described as follows: Init: A reservoir with the size: K ForI = k + 1ToN M = random (1, I ); If (M SwapTheMThValueAndIThValue End Someone has provided proof on the Internet and first forwarded it: [Switch] Proof: Each time it is selected based on the probability of K/IFor example, if K is 1000, the probability of 1001 being se

Description: Source http://bbs.csdn.net/topics/390899032 Forum DiscussionA 100HZ sine wave, I use the sampling rate of 300HZ to sample, then according to Shannon Law is not a second to collect 300 points, because this waveform is 100HZ, so this one second there are 100 waveforms, then 300 points on average to each waveform on only 3 points, That is, 3 points are collected on a waveform,The sampling rate is

website: http://digital.ni.com/public.nsf/allkb/A7AABC612F99CB82862574F000326EA5 Questions: I used an M-series board to collect and generate digital signals, and I knew that the board did not have an onboard timing engine, so I had to use other clock sources as the hardware timing source for that board, and what options I had to have to timing the digital IO.Answer: Use the following options to implement the digital IO hardware timing for the M-series boards. Note : Do not exceed the maximum nu

Label: style ar use SP strong file data Div on [Audio] The voice that the ears can hear is at 20Hz ~ 20 kHz Sonic It is called audio. [Sampling frequency] That is, the sampling frequency, which refers Number of times a sound sample is obtained per second . The higher the sampling frequency, the better the sound quality, and the more authentic the sound is. How

Continuous systems can be converted into discrete systems to form computer control systems. The selection of sampling rate is a key issue. If the sampling period is too large, the reconstruction of continuous signal distortion will be too large. If the sampling period is too small, the computation of the computer will be increased and the Computer load will be in

This article mainly wants to explain three questions:One is the numerical characteristics of the sample, The second is the difference between the variance of the sample and the mean of the sample , and the third is how to construct the sampling distribution.AFor simplicity, suppose there is a general ξ~n (µ,σ2) of the normal distribution, imagine that we randomly extract N samples, ξ1, ... Ξn.There is a sample mean and sample variance at this point.T

12.4 Replacement Inspection ReviewsIn addition to the coin and lmperm packages, R also provides additional packages that can be used for displacement testing. The perm package can implement some of the functions in the coin package, so it can be used as a validation of the results of the coin package. The Corrperm package provides a displacement test with a correlation of repeated measurements.The Logregperm package provides a permutation test for logistic regression. Another very important pack

Statistics of dynamic sampling are not recorded in the view, and sometimes the tables that have been analyzed are also evaluated. It is effective for CBO because RBO does not need statistics, so dynamic sampling is meaningless. (I) Role of dynamic sampling ① At the beginning of 10 Gb, RBO completely exited the stage of history, and CBO relied on sufficient sta

1. Reverse sampling When a non-horizontal and non-vertical straight line or polygon boundary is drawn on a Raster Graphic Display, a more or less jagged or tiered appearance is displayed. This is because the straight line, polygon, and color boundary are continuous, and the grating is composed of discrete points. It represents a straight line and polygon on the grating display device and must be sampled in a discrete position. Due to the information d

Canada S-1 Earth Drilling RIG-the world's lightest soil sampling rigCanada S-1 Earth Drilling Rig is the most portable, fast, efficient and convenient soil sampling rig, it can replace large hydraulic and electric drilling rig, the Canadian Geotechnical Engineering Association has been highly recommended, and become the Water conservancy, power, geology, Ore industry standard products.S1 Soil

Simple and clear example of interpolation audio re-sampling algorithm (with complete C code), simple and clear Interpolation In the recent period, the image algorithm and the audio algorithm were moved back and forth. There are frequent requirements for audio sampling and transcoding. Existing well-known open-source libraries, such as webrtc and sox, Reading the code is really disturbing. Audio re-

Android microphone audio sampling and usage Some codes of Android phone microphone sampling are found online. Sample results and functional code of your app: 1. In some apps, You need to obtain and use the audio input of the microphone, for example, a hot skirt; 2. Sampling thread: Public class MicroLevelRunnable implements Runnable {Private static final String t

Over the past few days, we have been using STM32 to write the sensorless BLDC driver framework. Therefore, we must use the six-way complementary PWM produced by The CCR1/CCR2/CCR3 of TIM1 and use the CCR4 to generate an interrupt, used in the PWM-ON of the generation of interrupt for zero crossing detection, and phase current detection. Over the past few days, I have been testing functions such as PWM, CCR4 interruption, ADC1 sampling trigger, and DMA

The calculation of the reduced-sampling filter can be deduced directly from the convolution equation:Y[n]=x[n]*h[n]=∑ (H[k]x[n-k])For M-Times minus sampling,Y[mn]=∑ (H[k]x[mn-k])You can see directly that you do not need to calculate all the output sample points.This formula and Oppenheimer's "Discrete Time signal processing" in the process of reducing the sampling