Dolby Surround Encoder

N/Aolby Surround Encoder is designed to encode multichannel program material for Dolby Surround release. The resulting matrix-encoded two-channel material can be distributed via any consumer medium, such as TV (including DTV); VHS; PC and console games; CDs; DVDs; and laser discs. The DP563 will find uses in all facilities where content is created for two-channel distribution formats.

Featuring a digital implementation of the 4:2 spatial encoder used in the analog SEU4 Dolby Surround Encoder, the DP563 combines discrete left, center, right, and surround input signals into the matrix-encoded, two-channel Dolby Surround format (Left total, Right total or Lt/Rt). Programs are compatible with stereo and mono playback, while providing four-channel playback on systems equipped with Dolby Surround Pro Logic decoding.

The DP563 can also pre-mix discrete, 5.1-channel material to the four channels required for Dolby Surround matrix encoding. Individual input level trims are provided for the center, surround, and low-frequency effects (LFE) channels. Either of the 5.1 program's surround channels, or their sum or difference, can serve as the single surround channel required for Dolby Surround encoding. LFE channel processing includes a switchable limiter and low-pass filter.

Other features include a calibration mode, test-tone outputs, reference input, an output limiter, adjustable output word length with dither, and variable coding delay (field/frame/ms).
Front-panel features include an LCD showing status parameters, and LEDs indicating both input and output channel activity. Controls are provided for setting configuration parameters, selecting user presets and control of the LED display and limiter functions.

The Model DP563 is not designed for the final mixing of matrix-encoded theatrical film soundtracks (Dolby Laboratories supplies dedicated film sound encoders for that purpose). It can be used, however, to preview the effects of the matrix process on discrete four channel elements ("4-2-4 monitoring") that subsequently will be included in a film soundtrack's final mix.

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