Project: Research and Implementation of DCI-Compliant 2K Digital Cinema Server
DSP Group, The Center of Pervasive Computing, Institute of Computing Technology, CAS, Beijing, China
Project Director: Prof. Zhensong Wang
Digital Cinema Initiatives, LLC (DCI) was created in March, 2002, and is a joint venture of Disney, Fox, Paramount, Sony Pictures Entertainment, Universal and Warner Bros. Studios. DCI's primary purpose is to establish and document voluntary specifications for an open architecture for digital cinema that ensures a uniform and high level of technical performance, reliability and quality control.
Download: DCI DCinema System Specification v1.2
The goal of our project is to independently develop the first DCI-compliant 2K digital cinema server in China.
Packaging: Packaging the DCDM(image, audio and subtitle) files using existing Material eXchange Format (MXF) specifications and eXtensible Mark up Language(XML)
Image format: 2K(Resolution: 2048*1080) or 4K(Resolution: 4096*2160)
Image pixel format: X'Y'Z' color space; Bit depth: 12bits/component, so 36bits/pixel
Compression: DCI compliant JPEG2000 codestream
Audio format: 16 channels; 24bits per sample; Broadcast Wave file format (.wav), using PCM WAVE coding.
Subtitle format: subpicture data is encoded as XML-based document; subpicture frames are encoded as PNG files;
Security: AES-128bit encryption
Bitrate: For the 2K resolution, the max bitrate is up to 250Mbps;
Our CDCS-2K digital cinema server consists of:
1. Server. ( A server with linux system and PCI-X interface)
2. Video processing card.( A reconfigurable SOC system, using PCI-X interface to connect with the server)
3. Audio processing card.( A reconfigurable SOC system, using PCI-X interface to connect with the server)
Some pictures about our CDCS-2K Server:
(Because there is no projector with dual-link interface in our lab, in order to facilitate our debug processing,
we should downsample the movie image at the output port, and use a digital monitor with a SDI interface to show the movie.
In these picture, the resolution of image is 2048*1080, DCI complaint JPEG2000 compression, bitrate is 250Mbps.)
01. Playing the DCI StEM (Standard Evaluation Material), the opening.
04. Our video processing card (the front side)
05. Our video processing card (the back side)