echo method

First, prefaceAs a result of the work, the author has been in contact with Echo cancellation (echo cancellation) technology since 2004, and has been engaged in the work related to echo cancellation technology in a large communications company, and

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

Output colored text in the shell using the echo commandNameecho-Displays a line of textProfileecho [Options] ... [String] ...DescribeOutputs a string to the standard output.-N does not output line breaks-E Open backslash ESC escape-e Suppress

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

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

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

"On the side of a PBX or bureau switch, a small amount of electrical energy is not fully converted and returned along the original path to form an echo." If the caller is not far from the PBX or switch, the Echo returns quickly and the human ear

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

Copy Code code as follows: echo "ASD";//String echo "ads$c";//String + variable Echo ' ads$c ';//String asd$c $c not variable echo "SD". " VS "; echo "SD", "vs"; echo $a; echo $a. $b; echo $a, $b; echo $a. $b $c; echo $a, $

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