When speaking of DOLBY DIGITAL, its actually the method of storing data by using "image correlation". Data is stored on film.
Tradition, the sound data was stored optically on film by varying light beam thickness.
But the crux of Digitl Dolby is that multichannel data can be stored with this technique. Using this stereo sound can be generated for 2.1 or 5.1 sound systems.
Dolby Digital, formerly known as AC-3, is a digital audio coding technique that reduces the amount of data needed to produce high quality sound.
Dolby Digital takes advantage of how the human ear processes sound.
When coding noise is close to the frequency of an audio signal, that audio signal masks the noise so that the human ear hears only the intended audio signal.
Sometimes the coding noise is not in the same frequency of an audio signal and must be reduced or eliminated.
By reducing, eliminating, or masking the noise, the amount of data is reduced to one tenth of the data on a compact disk (CD).
Dolby Digital is used with digital versatile discs (DVDs), high definition television (HDTV), and digital cable and satellite transmissions.
It has been selected as the audio standard for digital television (DTV).
The European DVB standard does not use Dolby Digital for audio, but instead uses MPEG standard technology for both the audio and video signals.
Dolby Digital provides five full-bandwidth channels, front left, front right, center, surround left, and surround right, for true surround sound quality.
A low frequency effect (LFE) channel is included that provides the sound needed for special effects and action sequences in movies.
The LFE channel is one-tenth of the bandwidth of the other channels and is sometimes erroneously called the subwoofer channel.
This multichannel scheme is known as 5.1 channel.
Tradition, the sound data was stored optically on film by varying light beam thickness.
But the crux of Digitl Dolby is that multichannel data can be stored with this technique. Using this stereo sound can be generated for 2.1 or 5.1 sound systems.
Dolby Digital, formerly known as AC-3, is a digital audio coding technique that reduces the amount of data needed to produce high quality sound.
Dolby Digital takes advantage of how the human ear processes sound.
When coding noise is close to the frequency of an audio signal, that audio signal masks the noise so that the human ear hears only the intended audio signal.
Sometimes the coding noise is not in the same frequency of an audio signal and must be reduced or eliminated.
By reducing, eliminating, or masking the noise, the amount of data is reduced to one tenth of the data on a compact disk (CD).
Dolby Digital is used with digital versatile discs (DVDs), high definition television (HDTV), and digital cable and satellite transmissions.
It has been selected as the audio standard for digital television (DTV).
The European DVB standard does not use Dolby Digital for audio, but instead uses MPEG standard technology for both the audio and video signals.
Dolby Digital provides five full-bandwidth channels, front left, front right, center, surround left, and surround right, for true surround sound quality.
A low frequency effect (LFE) channel is included that provides the sound needed for special effects and action sequences in movies.
The LFE channel is one-tenth of the bandwidth of the other channels and is sometimes erroneously called the subwoofer channel.
This multichannel scheme is known as 5.1 channel.
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