SL4AANDITS RELATED TECHNOLOGIES
B. TTS and ASR Technologies The full na me of TTS is Te xt To Speech. The task of TTS is to convert text information into audible speech information. The initial version of Android that supports TTS is 1.6. Pico and iFLYTEK are common TTS softwares. This type of TTS software provides a TTS engine, language packs, and TTS interfaces. TTS interfaces of Pico and iFLYTEK are compatible with the TTS interfaces of the Android system. The TTS engine is separated from language packs. SL4A apps use TTS functions of Pico and iFLYTEK by calling TTS interfaces of Android system. The advantages of iFLYTEK are good interface compatibility and easy expansion of multi language, but the lack of iFLYTEK can not dynamically ad just speech parameters, such as language and speaking speed, during the run time of programs. The full na me of ASR is Automated Speech Recognition. It is a technology to convert human voice into text. At present, the two companies of iFLYTEK and Ba idu are the fa mous developers on ASR technology in China. ASR interfaces of iFLYTEK a re compatible with the ASR interfaces of the Android system. SL4A apps can use iFLYTEK ASR functions by calling ASR interfaces of the Android system. iFLYTEK ASR software supports Android, iOS and Windows Phone and other mainstream system. And it supports Chinese and English and many other languages. And it has high recognition rate and recognition speed.