• Dolby E: Enabling Multichannel Audio

    An audio encoding technology, Dolby E enables broadcasting and postproduction facilities to carry up to eight channels of sound over their existing stereo (two-channel) infrastructures.

    Dolby E Benefits

    • Support for Eight Channels

      Enables broadcast facilities with a two-channel infrastructure to distribute up to eight channels of audio (a 5.1 surround soundtrack plus two additional tracks)

    • Multichannel Audio for Live Events

      Enables simple contribution of multichannel audio for live events

    • Frame-Accurate Audio

      Provides frame-accurate audio to ensure effortless switching, editing, encoding, and decoding

    • Multiple Encode and Decode

      Allows audio to be repeatedly encoded and decoded throughout the broadcast chain without any discernible loss in quality

    An Easier Transition to Multichannel Audio

    The demand for high-quality multichannel sound to complement the impressive picture of today's HDTV programming presents challenges if you're a broadcaster whose facilities were built for two-channel audio. Dolby® E makes your transition to multichannel sound easier by giving you the ability to distribute up to eight channels of audio, plus metadata and timecode, via the existing stereo channels (AES/EBU) available on conventional digital videotapes, video servers, communication links, switchers, and routers.

    Unlike some other Dolby technologies, the Dolby E signal never reaches your home viewer. Rather, it's decoded back to baseband audio just prior to the final transmission and then reencoded into the final audio format—Dolby Digital, for example, or Dolby Digital Plus™.

    The Dolby E encoding system is ideal for producing and broadcasting live events because it facilitates the contribution of multichannel audio from the event back to the broadcast center. The system has been used in the broadcasting of professional sports, live music events, and awards shows.
 It has also won many awards itself, including a technical Emmy®.

    Dolby E Preferred Alignment

    Learn about Dolby's recommended approach to ensure error-free editing and switching of Dolby E signals.

    Broadcast Solutions

    Find hardware and software products to help you deliver what consumers want.

    Dolby E for Professionals

    The Dolby E encoding system makes it easier for almost any broadcasting or postproduction facility to carry multichannel audio.

    Broadcasters

    Deliver 5.1 surround sound using your existing infrastructure.

    Dolby E Specifications

    Audio coding algorithm

    Dolby E

    Dolby E program configurations (user selectable)

    5.1; 3×2; 5.1+1+1; 6×1; 5.1+2; 8×1; 4×2; others selectable

    Audio sampling rate

    48 kHz

    Video frame rates

    29.97 fps (NTSC); 25 fps (PAL); 23.98, 24, 30 fps (requires DP579 Dolby E Tri-Level Sync Interface)

    Frequency response

    20 Hz to 20 kHz, ±0.25 dB

    Distortion

    <0.01% at 1 kHz; <0.02% at 20 Hz to 20 kHz

    Dynamic range

    >110 dB

    Delay

    Encoding: fixed, one video frame; PCM delay channel: fixed, one video frame

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