DP563 Dolby Surround Encoder

The DP563 Dolby 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 is useful in all facilities where content is created for two-channel distribution formats.

Featuring a digital implementation of the Dolby Surround matrix 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 [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 premix discrete, 5.1-channel material to the four channels required for Dolby Surround matrix encoding. Individual input level trims are provided for center, surround, and low-frequency effects (LFE) channels. The single surround channel, required for the Dolby Surround Encoder, can be selected from the left or right surround channels, or their sum or difference. LFE-channel processing includes a switchable limiter and a lowpass filter.

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

Dolby Laboratories, Inc., 100 Potrero Avenue, San Francisco, CA 94103-4813. Tel: 415-558-0200; Fax: 415-863-1373.