I've made a wearable computer out of a mac plus (re-engineering the motherboard to 4" square) and at 8MHz it does text to speech... :) I'm also working on a Versa V/50 model, and PowerBook 140... >>I'd really like to add audio to my wearable to do at least text to >>speech, but I'm hesitant to add yet another card to the pc/104 stack, or >>add the serial port driven doubleTalk box. Has anyone thought about >>using an off the shelf speech synthesizer chip? I've seen single chips >>at radio shack that do text to speech, and although the quality of the >>output may be pretty bad, it would be a way to add speech capability to >>my wearable without adding alot of additional electronics and boards. I >>did a quick search and there are lots of vendors selling single chip >>speech synthesizers, so I imagine some of them are pretty easy to build >>serial interfaces to. >> >>Any suggestions for chips? and whether this is relatively easy to do? >> >>-Paul > >How about a DSP solution, like the Analog Devices 2181. I'm planning on >getting an EZ-Kit to >investigate this. > >My plan is to use an outboard DSP peripheral connected via a serial or >parallel port. This will >allow speech input and output with lower CPU overhead. > >For speech input the DSP periph samples the mic input and sends feature >vectors (Mel scaled >cepstrum, etc) to the wearable. Higher level analysis (HMM/neural net >etc) takes place on the >wearable) > >For speech output, the wearable sends low bandwidth data (LPC-10, GSM, >maybe even MP3) and drives a >speaker/headphone. > >Any advice/ideas?
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