Dolby - Cat. No. 778 Digital Input / Output Card

A CP650 accessory, the Dolby® Cat. No. 778 adds digital audio input and output capabilities to the Dolby CP650 Cinema Processor, making it particularly appropriate for studio applications requiring digital throughput. It also provides Dolby Digital Surround EX™ decoding, and decodes Dolby Digital bitstreams from non-film sources such as DVDs, digital video recorders, digital cinema servers, and digital television broadcasts.

When installed in a CP650 with version 2.2 or newer software, the Cat. No. 778 also provides Unity Gain and Noise Floor Optimization features. Unity Gain maintains the original level of digital signals as they pass through the CP650, while Noise Floor Optimization maximizes each channel's headroom based on its B-chain settings to provide the lowest possible noise floor within the CP650.

Once the Cat. No. 778 has been installed, its digital inputs and outputs are accessed via the Option Card I/O 25-pin female D-connector on the CP650's rear panel.

Note: Installation of the Cat. No. 778 automatically disables the CP650's analog outputs.

Specifications
Documents

Digital Audio Coding

16-, 20-, and 24-bit PCM, 44.1 to 48 kHz

Digital Audio Inputs

4 × AES/EBU, balanced (up to eight channels)
Input impedance: 110Ω

Digital Audio Outputs

5 × AES/EBU, balanced (up to ten channels)
Output impedance: 110Ω

Channel Pair Designations

AES 1 (L/R) Left/Right
AES 2 (C/LFE) Center/Low-Frequency Effects
AES 3 (Ls/Rs) Left surround/Right surround
AES 4 (Bsl/Bsr) Back surround left/Back surround right
AES 5 (Le/Re) Left extra/Right extra

Synchronization

The system synchronizes to the first digital input pair (L/R); other digital inputs must be phase- and sample-synchronous

Additional Playback Formats

With the Cat. No. 778 installed, the CP650 supports the following additional digital playback formats:

80

Master Digital (auto-switching)
Dolby Digital (non-film)
PCM two-channel: L, R discrete or Dolby Pro Logic® decoding

81

Master Digital with Surround EX decoding

85

Five-screen-channel
PCM In: L/R, C/LFE, Ls/Rs, Bsl/Bsr (Le/Re input on Bsl/Bsr)
PCM Out: L/R, C/LFE, Ls/Rs, Bsl/Bsr (copy of Ls/Rs), Le/Re

86

Five-screen-channel with Surround EX decoding
PCM In: L/R, C/LFE, Ls/Rs, Bsl/Bsr (Le/Re input on Bsl/Bsr)
PCM Out: L/R, C/LFE, Ls/Rs, Bsl/Bsr, Le/Re

88

Six-channel
PCM In: L/R, C/LFE, Ls/Rs
PCM Out: L/R, C/LFE, Ls/Rs

89

Six-channel with Surround EX decoding
PCM In: L/R, C/LFE, Ls/Rs
PCM Out: L/R, C/LFE, Ls/Rs, Bsl/Bsr

90

Seven-channel
PCM In: L/R, C/LFE, Ls/Rs, Bs
PCM Out: L/R, C/LFE, Ls/Rs, Bsl/Bsr

ENLARGE

Cat. No. 778

Specifications Sheets

Dolby Cat. No. 778 Digital Input and Output Card

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