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
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
As we all know, if Echo follows an environment variable, but the variable is empty, the equivalent of an echo without any arguments, that is, whether the current echo is on or off. Many articles or tutorials offer solutions that add a dot 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
In php programming, the difference between using commas for echo and using dots is that using commas for echo. In php programming, the difference between using a comma for echo connection and using a dot number is that using an echo string is better
Tlcl-view the world echo in shell eyes, tlcl-view echo
View the world in shell eyes
Echo-display a line of text
When you enter a command, bash expands the input characters before executing the command.
Expand path
Echo *
Shell expands * to the
"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
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