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LXjhFKSRkoAGYere2T46LxduLzcwBKPJz9| Metric | DEE (Software) | DP580 (Hardware) | |--------------------------|-------------------------|---------------------------| | Latency (5.1, 384 kbps) | 18.2 ms | 16.0 ms | | CPU usage (per stream) | 12% (Xeon Gold 6248) | N/A | | Concurrent streams (1U) | 32 (at 3.0 GHz) | 1 (per card) | | Power consumption | 150 W (server) | 25 W (encoder) | | Metadata flexibility | Full (API-driven) | Limited (front panel) |
[3] Bosi, M., & Goldberg, R. E. (2003). Introduction to Digital Audio Coding and Standards . Springer.
Dialnorm = -31 + 10 * log10( (1/N) * Σ x_i² ) where ( x_i ) are the dialogue-gated samples. dolby encoding engine
[4] ITU-R BS.1770-4. (2015). Algorithms to measure audio programme loudness and true-peak audio level . International Telecommunication Union.
[2] ATSC Standard A/52:2020. (2020). Digital Audio Compression (AC-3, E-AC-3) . Advanced Television Systems Committee. | Metric | DEE (Software) | DP580 (Hardware)
DEE selects the frame size adaptively. For low-delay applications (e.g., video conferencing), it can force 256-sample frames in E-AC-3, reducing algorithmic delay to 5.3 ms at 48 kHz. Dialnorm is a metadata parameter that indicates the average loudness of dialogue relative to -31 dB FS. DEE implements a Leq(A) measurement over a sliding window of 5 seconds, as per ITU-R BS.1770-4.
[5] PEAQ – ITU-R BS.1387-1. (2001). Method for objective measurements of perceived audio quality . Dolby Encoding Engine, AC-3, E-AC-3, Dolby Atmos, audio compression, broadcast, low-latency encoding, dialnorm. Introduction to Digital Audio Coding and Standards
Abstract: The proliferation of multi-channel audio formats (5.1, 7.1, Atmos) and object-based audio has created a need for efficient, real-time encoding solutions. The Dolby Encoding Engine (DEE) serves as a software-based, enterprise-grade tool for transcoding Pulse Code Modulation (PCM) audio into Dolby Digital (AC-3), Dolby Digital Plus (E-AC-3), and Dolby Atmos metadata. This paper examines the system architecture of DEE, its psychoacoustic modeling core, bit-rate reduction techniques, and its role in live broadcast, over-the-top (OTT) streaming, and post-production workflows. We compare its latency profile against hardware-based encoders and analyze its compliance with the ATSC 3.0 and DVB standards. 1. Introduction As consumer audio moved from stereo to immersive formats, broadcasters and streaming services required a software-defined method to encode multichannel audio without dedicated DSP chips. Dolby Laboratories introduced the Dolby Encoding Engine (DEE) as a cross-platform (Linux, Windows, macOS) solution that integrates into transcoding pipelines (e.g., FFmpeg, AWS Elemental, Harmonic).
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Monogatari would not be possible without these awesome and open source projects!
CSS library for entrance, exit and other animations
JavaScript library for DOM manipulation, storage and other utilities
CSS library for shake animations
Next-generation forum software used for the community forum.
Font used for all the icons on the UI
CSS library with all the base styling for grids, modals, etc.
JavaScript library for handling keyboard shortcuts
Web Components library for creation of custom elements
JavaScript library for creating particle systems
JavaScript library for creating typewriter text animations
Every story should be told before they are lost forever.
Monogatari's goal is not competition, here are some awesome Open Source engines you might want to check out!
