Multichannel Audio Encoder

The DP569 is the reference Dolby Digital multichannel audio encoder. It supports encoded bit rates from 56 to 640 kbps and channel configurations from mono to 5.1-channel surround sound. The DP569 is intended for digital television and disc authoring applications, including automated broadcast installations and mastering for DVD and other recorded media. The DP569 provides three pairs of AES3 digital audio inputs and a single AES3 output. A separate AES3 input may be used for a clock reference signal. Previously encoded Dolby Digital audio bitstreams pass through unchanged—automatically, if the DP569's bitstream detection feature is activated. Matrix encoding on Dolby Surround encoded input signals also remains unaffected. EBU/SMPTE LTC and VITC timecode inputs make it possible to start and stop the encoder accurately to create separate program segments and soundtrack files for disc authoring. For on-air and other broadcast applications, timecode can be used to trigger encoder configuration changes automatically for smooth program transitions. In some systems, the DP569 can also derive the time stamps required for A/V synchronization. A rear-panel connector provides external metadata input from other Dolby products. Two additional connectors are provided for general-purpose I/O signals, including status and control signals. Fault-monitoring circuits warn of actual or potential system failure, and bypass connections enable a hot-standby mode for broadcast installations. The DP569's front panel features an alphanumeric LCD showing status parameters and tri-color LEDs indicating channel activity. Controls include buttons for setting the front-panel display, configuration parameters, and default and preset modes. Front-and rear-panel serial interfaces, along with supplied application software, make it possible to configure and control the DP569 from a Windows PC or other remote device. For decoding Dolby Digital material, the Dolby DP562 Multichannel Dolby Digital Decoder is an ideal companion to the DP569. As well as 5.1- channel Dolby Digital decoding, it provides four-channel Dolby Surround Pro Logic decoding. Registered owners receive software upgrades to add new features and functionality.

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