Asao (codec) - Use in Flash Technology

Use in Flash Technology

On March 4, 2002 Nellymoser Inc. announced that Macromedia licensed Nellymoser's Asao speech and audio compression software to be part of FlashMX and Macromedia Flash Player 6. (Macromedia is now Adobe Systems.) The Nellymoser Asao codec is an integral part of the Flash-plugin since Flash version 6, released in 2003. The codec is optimized for real-time and low-latency encoding of audio. Flash Player clients, when recording audio from a user's microphone, can use the Nellymoser Asao codec. (Flash Player 10 released in 2008 also supports the open source Speex codec.) The sampling rate of the audio capture can be controlled by the Flash programmer to increase and decrease encoding bitrate and quality. Encoding is done on the client host, and compressed data is then sent using Adobe's RTMP protocol to an RTMP server (Flash Media Server, Wowza Media Server).

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