Chap70

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Chap70

  1. 1.  Describe the various audio formats for multimedia platforms.
  2. 2. In This Chapter, you’ll learn on:  The usage of each audio formats for various multimedia platform o RAW o MP3 o AIFF o MPEG o WAV o ACT o WMA
  3. 3. Format File extens ion Description RealAudio.rm .ram The RealAudio format was developed for the Internet by Real Media. The format also supports video. The format allows streaming of audio (on-line music, Internet radio) with low bandwidths. Because of the low bandwidth priority, quality is often reduced. It is typically used in conjunction with RealVideo and RealAudio and is used for streaming content over the Internet.  Sound Formats for multimedia
  4. 4. Format File extens ion Description Wave .wav The Wave (waveform) format is developed by IBM and Microsoft. It is supported by all computers running Windows, and by all the most popular web browsers (except Google Chrome). The usage of the WAV format has more to do with its familiarity, its simplicity and simple structure, which is heavily based on the RIFF file format. Because of this, it continues to enjoy widespread use with a variety of software applications, often functioning as a 'lowest common denominator' when it comes to exchanging sound files among different programs.  Sound Formats for multimedia
  5. 5. Format File extens ion Description WMA .wma The WMA format (Windows Media Audio), compares in quality to MP3, and is compatible with most players, except the iPod. WMA files can be delivered as a continuous flow of data, which makes it practical for use in Internet radio or on-line music. ACT .act ACT is a lossy ADPCM 8 kbit/s compressed audio format recorded by most Chinese MP3 and MP4 players with a recording function, and voice recorders.  Sound Formats for multimedia
  6. 6. Format File extens ion Description Apple Macintosh Audio File .aiff Audio Interchange File Format (AIFF) is an audio file format standard used for storing sound data for personal computers and other electronic audio devices. One advantage of AIFF over WAV is that it has standardised support for metadata (including album and track information and cover art). In iTunes, AIFF files can support lyrics and cover art, while WAV cannot. Raw audio data. .raw RAW Audio format or just RAW Audio is a computer format for storing uncompressed audio in raw form.  Sound Formats for multimedia
  7. 7. Format File extens ion Description MP3 .mp3 .mpga MP3 files are actually the sound part of MPEG files. The MPEG format was originally developed for video by the Moving Pictures Experts Group. MP3 is one of the most popular sound formats for music. The encoding system combines good compression (small files) with high quality. Expect future software systems to support it.  Sound Formats for multimedia
  8. 8.  Sound Formats for multimedia  The WAVE is the most popular uncompressed sound format on the Internet, and it is supported by all popular browsers. If you want uncompressed sound (music or speech) to be available to all your visitors, you should use the WAVE format.  The MP3 format is the newest format for compressed recorded music. The term MP3 has become synonymous with digital music. If your website is about recorded music, the MP3 format is the choice.

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