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DVD & blu-ray Audio

Audio with video playback

DVD surround - Dolby Surround, Dolby Digital or DTS *

Blu-ray surround sound - Dolby Surround or DTS *

One file can playback to 48 KHz 24 bit to 5 full-range speakers plus a 20 to 120Hz 24 bit, separate bass speaker. The original audio is compressed, selectively removing details and data is discarded. Most people cannot notice much of a change in audio quality. File sizes are much smaller and output to all 5 full range speakers for DVD and to 7 full range speakers for blu-ray is possible.

High Definition Blu-ray surround sound

  • Dolby True HD *


  • DTS HD Master Audio*

    dts audio
  • An audio file can be read and expanded back to 5 channel playback plus bass 5.1 or even 7 channel playback plus bass, 7.1. All the speakers get audio signals that are recreated equal to the originals at a sample rate of 48KHz. No data is lost.

    Linear PCM

    One file can playback 96 KHz or 192 KHz stereo uncompressed or 8 channels uncompressed.

    * Not all DVD / blu-ray players will playback these audio files. Additional, compatible amplifiers are often needed.

    An amazing and detailed audio FAQ may be found at Bobby Owsinski site: Surround Associates.



    Blu-ray audio type
    &
    number of channels

    Encoded or Original Waveform PCM

    Lossless? (no quality lost)

    Included in blu-ray players?

    Recommendations for surround system

    Dolby Digital (DD) - format used for DVDs, 5.1-channel surround sound.

    Encoded

    No

    Standard

    Mid range - Analog in, okay. HDMI preferred

    DTS Digital Surround - format used for DVDs, 5.1-channel surround sound.

    Encoded

    No

    Standard

    Mid range - Amplifier to handle DTS.

    Dolby Digital Plus (DD+) - extension of Dolby Digital, 7.1-channel surround sound.

    Encoded

    No

    Optional

    Mid range - Analog in, okay. HDMI preferred.

    Dolby TrueHD - lossless encoding of up to 8 channels of audio.

    Encoded

    Yes

    Optional - most with HDMI only out. Some have analog out.

    High end with HDMI input

    DTS-HD High Resolution Audio - extension of DTS, 7.1-channel surround sound.

    Encoded

    Yes

    Optional - most with HDMI only out. Some have analog out.

    High end with HDMI input

    DTS-HD Master Audio - lossless encoding of up to 8 channels of audio.

    PCM

    Yes

    Optional - most with HDMI only out. Some have analog out.

    High end with HDMI input

    Linear PCM (LPCM) - up to 8 channels of uncompressed audio.

    PCM

    Yes

    Standard

    High end with HDMI input