Nokia 9290 Video Style Guide - Page 10

Nokia Mobile Phones Nokia 9290 Communicator Video Editing for the Nokia 9290 Communicator 10(12) • Stereo sound is converted to mono sound. • The audio sampling rate is converted to 8 kHz. • Audio is compressed. As the steps above are relatively trivial and non-controllable except for the last step, we only consider audio coding in this section. For audio-video files, you can select one of the two options in the "Audio format" field: • Music, normal compression. For high quality audio containing music and/or some other more demanding material. IMA ADPCM is used, resulting in 32 kbps. • Speech, high compression. If the original file contains only speech or if a small file size is more important than the sound quality. The AMR 10.2 kbps mode is used. 6. Appendix B. Abbreviations ADPCM Adaptive Pulse Code Modulation AMR Adaptive Multi-Rate speech codec AVI Microsoft Audio-Video Interleaved file format CD-ROM Read-Only Compact Disc DCT Discrete Cosine Transform GSM Global System for Mobile Communication HSCSD GSM High Speed Circuit Switched Data HTML Hypertext Markup Language Hz Hertz, 1/sec IMA Interactive Multimedia Association ITU-T International Telecommunication Union, Telecommunication Standardization Sector kbps kilobits per second MPEG ISO/IEC Moving Pictures Experts Group MPG File name extension for MPEG-1 file format MP3 MPEG-1 Audio Layer 3 audio coding NIM Nokia Interleaved Multimedia file format PC Personal Computer Copyright  Nokia Corporation 2001-2002. All rights reserved.