echo line number

First, because of the work of the relationship, the author since 2004 contact Echo cancellation (echo cancellation) technology, and has been engaged in a large communications enterprises with ECHO cancellation technology related work, the echo

First, prefaceto understand echo cancellation technology, we have to mention the theory of digital signal processing as the theoretical basis of modern communication technology. First of all, there is an important branch of the digital signal

From the reason of communication echo, can be divided into acoustic echo (acoustic echo) and line echo (lines echo), the corresponding echo cancellation technology is called acoustic echo cancellation (acoustic echo cancellation, AEC) and line echo

Transfer from China VoIP Forum On the PBX or local switch side, a small amount of power is not fully converted and returns along the original path, forming an echo. If the caller is not far from the PBX or vswitch, the echo will return very

Frequently-used commands echo, @, call, pause, and REM (TIPS: Use: instead of REM) are the most frequently-used commands for batch file processing. We started from them. First, @ is not a command, but a special identifier for DOS batch processing.

I. Features of ECHO in Internet voice communicationCompared with traditional telephones, real-time voice transmission over the Internet has a fatal weakness. That is, the quality of voice is poor, and there are many factors that affect the quality

1.1 Learning the Echo rem CD dir command Learning points:1. Display information: Echo2. Comment Statement: REM3. Directory Switching: CD4. Column File name: dir One, display information: Echo Before we learn the echo command, we'll build a new

The echo command for Linux, which is very common in shell programming, is often used when printing variable value under a terminal, so it is necessary to understand the use of EchoThe function of the echo command is to display a piece of text on the

Turn from: http://blog.chinaunix.net/uid-28458801-id-3460227.html Overlay writing (the original content in the file is covered) echo "AAA" > A.txtecho AAA > A.txtAdd style (The new content is added after the original content)echo "AAA" >> a.txtecho

Linux echo command learning function description: displays text. Syntax: echo [-ne] [String] or echo [-- help] [-- version] www.2cto.com. Note: echo sends the result string to the standard output by default. The output strings are separated by blank