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32 Threads found on Voice Over Can
i am trying to develop square wave inverter of 2 kw 220v and frequency range from 5khz to 50khz using h bridge drive configuration . The problem right now i am facing is whenever i connect my inverter with load bank i hear tick tick noise from load bank. also the intensity of voice increases when the frequency increases can anyone please help
hi all, i am planning to do a project on voip with real time devices. i am new to this.. can anyone tel me what r the devices that i ll need , and if any software if i ll have to learn.. i saw dis asterisks and was nt able to get wat its gonna be used for.. should i start learning basic ccna voice commands.? Thanks in advance
Hello every one .. I need opnet 16 for LTE voice over ip simulation for my graduation project .. but of course I can't purchase the license and uni program doesn't replay to me. Any one has a way to get that software????????????? Advanced thank to u.
Hi, Is there any cheap IC that can encode MP3 ? Or an PIC32MX is powerful enough to encode mp3 at telephone quality? I want to send voice over ethernet in mp3 format. thanks
Hello Friends I am wrking on project in which i am supposed to establish voice communication over bluetooth using avr microcontrller .plz help me finding suitable bluetooth module..with serial port for interfacing
A description of GSM voice codecs can be found at various places at the internet, e.g. GSM - Wikipedia, the free encyclopedia ANSI-C code that represents the algorithms of the half- and full-rate codec can be downloaded at
Dear All; I need to make a TCP/IP Client on which i have to to stream following - Serial Port (bi-directional) - voice (bi-directional) Please tell me if this solution can be implemented on any Microchip MCU or if there any existing solution/package for this for this. Regards Saeed
Hi, I want to transmit voice over RS232 and replay it in real-time using one of the Mega AVRs. The problem is the interval between samples. Since I'm using a computer on one side ,can I rely on the pauses(between transmissions) that I make in the computer program ? Is it more efficient to use PCM ? If yes please guide me through a source (...)
I need a voice recognition software that'll give me voice recognition as well as interfacin with parallel or serial port plz tell me name of the software wazi88(at)
Hi In order to that you will need to sample the voice (using ADC) at known sample rate (most voice can be sampled using 8 KHz sample rate) To save band width you will also need to compress the voice using a known algorithm like ADPCM Or G721(more complex) And then you can send the DATA via the (...)
What do you mean about voice Chat? VoIP needs a RTP connection to be established between users. voice messages can be sent as a form of instant message. For instance SIP is a signaling protocol used to create an RTP media connection between users. But SIP can carry messages embedded within it's body without the need of (...)
SIP is a signaling protocol used for VOIP, ie. it's used to establish a phone call, so one can say SIP is to VOIP what SS7 is to PSTN. There are a few signaling protocols developed by different bodies SIP is developed by the IETF (the body that develops the internet standards) and the h32x family (h323 is for voice over ethernet with no (...)
I am going to design a system to transceive the voice signal which is digitalized and encrypted for security . In my way, I am get analog singal (voice) through the CODEC block then compress it (using Vocoder ). After that I encrypt this digital signal. Thirdly, modulate this signal then transmit over the line. So anyone (...)
Hello everyone.... can anyone please help me out in....."how to do the matlab code for speech processing (i.e)...voice over ip (VoIP) using different audio codecs such as G.711, G.729,SPEEX etc". can u just tell me how to use the CODEC by taking a input signal (.wav files) and do the programming ..... if anyone knows abt (...)
Hi I want to transcieve voice via MIC and SPKR of sim300, in GPRS mode to another sim300 connected to GPRS. Anybody can help in any way ? Thanks Do I have to alter the SIM300 Bios to have this functionality or does it support this feature already?
Hi, Dear u must go to VOIP (voice over IP ) all the worl now use voip , i suggest it to u . Thanx BR\\ Tamer
hi Contains MPLS Tutorial McGraw Hill - voice over MPLS Planning and Design Networks Computer Networks, Fourth Edition By Andrew S. Tanenbaum
hello VoIP basically means that IP is used for transportation of voice Details well the audio chat is a kind of VoIP but VoIP can be of many forms like IP Telephony is also a kind of VoIP but IP Telephony is an advance form it can be between PC to PC PC to Phone Phone to PC now audio chat over LAN doesnt (...)
It stands for : Regular Pulse Excitaion - Linear Predition Code LPC is based on slow changing signals like voice , over a short window of samples can be used to expect the next sample with certain degree of error that can be minimized by acurate statistics , the idea is instead of sending the voice (...)
that's a lot of subjects, i can reply you concerning VoIP: VoIP is to carry out normal voice signal over a data network working with TCP/IP protocol, the idea is to use DSP to convert analog voice into digital signal , then use protocols like RTP to encapsulate digital signal into packets , then use protocols like H.323 to (...)
Voip is voice over Internet Protocol, or using a telephone over the internet via your PC. You can find it all over the web. It's nothing to do with about EDAboard.
hi, i need to design a project based on voice over ip and i need some one to help me to find chips i need to start working with this project thanks for every body need to help Fire in The Wire :idea:
yes i know that it call VOIP,but i mean by algorithm,is that if u want to transmit a voice over network u have to compress it .and by that i mean if any one know something about voice compression can help me ?? but anyway thank u for answering me....
The microphone input will be AC coupled and filtered to voice frequencys. The usuall way is to use audio frequency shift keying. There is a lot of information on the web about packet radio with an amateur radio license. When I played with it a few years ago the standard mode was 1200baud, I vaguely recall it sent a single cycle of 1200HZ or 240
Hmm, I went throught the article, it was informative. I have a question, how does the received and transmitted voice signal travel over the same copper pair? Doesn't any interference occur? Magnetra Read more of telephone... Phone using bridge to cancel voice from mic, but still hear opposite side (...)
If you dont need real-time voice transfer, you can record the voice on a PC using any good codec avaialable with the PC. That file can be shared over the LAN or can be avialable on the server for anyone to download.
Hi You must start by sampling the voice using the ADC in 8KHz smpling frequency then compress the the voice data into lower size using some algorithm like ADPCM dived the data into packet and send the packet using the can bus When you receive the data decompress it and use an D/A converter to convert the data into (...)
Usually under 1 GHz humidity and rain don't paly a big role in attenuation, you can estimate some 0,2 dB /Km. Take instead a lot of care at the link margin; if you have to transmit data at least 20 dB margin, for voice 10 to 15 dB is enough. Mandi
hi I want to know how can i deal with cl30(shell program) because this program didn't run in DOS or WINDOWS. so i want your help to run this program. aslo if you know how what is the operation (function) of DSP in project like VOIP(voice over IP)
Hi, I am doing a project in which I require to couple output of digital voice recorder IC APR9600 to telephone line. The purpose is to play recorded messages over telephone. I have already interfaced output MT8880 DTMF dialer chip to telephone line via 1:1 transformer. can anyone show me simple schematic to connect (...)
I want circuit schematic and source code for sending data over GSM voice and on any wireless voice gadgets
hello, i want to do voice transfer on electric lines please help me digitallan...