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knutinh
Gjest
www.dcimovies.com
http://www.dcimovies.com/DCI_Digital_Cinema_System_Spec_v1.pdf
3.2. Image Specification
3.2.1. Image Concepts and Requirements
3.2.1.2. Image Structure
The DCDM shall provide an image structure container that consists of either a 2K (2048
x 1080) or 4K (4096 x 2160) image file as defined in Table 1. It is expected that the
image structure shall use one of the two containers such that either the horizontal or
vertical resolution is filled. For example, a 4K image file with a 2.39:1 aspect ratio would
require an image structure of 4096 x 1714, therefore filling the horizontal resolution of
the 4K container. The pixel orientation, as displayed on the screen, shall be understood
to flow from left to right and top to bottom. Also, the horizontal and vertical pixel count
shall begin with 0. For example, the top left pixel of the displayed image shall be
anotated as (0, 0).
3.2.1.7. Bit Depth
The bit depth for each code value for a color component shall be 12 bits. This yields 36
bits per pixel.
3.3. Audio Specification
3.3.1. Audio Concepts and Requirements
Digital Cinema audio requires standardized characteristics, channel mapping and a file
format to successfully playback in a motion picture theater.
3.3.2. Audio Characteristics
3.3.2.2. Bit Depth
The bit depth shall be 24 bits per sample. Material having other bit depths shall be
justified to the most significant bit per [AES3-2003 Section 4.1.1].
3.3.2.3. Sample Rate
Irrespective of the associated image frame rate, the audio sample rate shall be either
forty-eight or ninety-six thousand samples per second per channel, commonly expressed
as 48.000 or 96.000 kHz. At 24 FPS playback, there are exactly 2,000 audio samples
per frame for 48.000 kHz and exactly 4,000 audio samples per frame for 96.000 kHz. At
48 FPS playback, there are exactly 1,000 audio samples per frame for 48.000 kHz and
exactly 2,000 audio samples per frame for 96.000 kHz.
A theater playback system shall have the capability of performing sample rate
conversion as needed.
3.3.2.4. Channel count
The delivered digital audio, contained within the Digital Cinema Package (DCP), shall
support a channel count of sixteen full-bandwidth channels.
4.4. Codestream Specification
...
For a frame rate of 24 FPS, a 2K distribution shall have a maximum of 1,302,083 bytes
per frame (aggregate of all three color components). Additionally, it shall have a
maximum of 1,041,666 bytes per color component per frame.
Note: For information purposes only, this yields a maximum of 250 Mbits/sec total and a
maximum of 200 Mbits/sec per color component.
For a frame rate of 48 FPS, a 2K distribution shall have a maximum of 651,041 bytes per
frame (aggregate of all three color components). Additionally, it shall have a maximum of
520,833 bytes per color component per frame.
Note: For information purposes only, this yields a maximum of 250 Mbits/sec total and a
maximum of 200 Mbits/sec per color component.
A 4K distribution shall have a maximum of 1,302,083 bytes per frame (aggregate of all
three color components). Additionally, the 2K portion of each frame shall satisfy the 24
FPS 2K distribution requirements as stated above.
Note: For information purposes only, this yields a maximum of 250 Mbits/sec total and a
maximum of 200 Mbits/sec per color component.
7.5.3.6. Bandwidth
The storage system is required to provide enough output to support a continuous stream
of 307 Mbits/sec for compressed image, uncompressed audio (16 channels, 24 bit
sample, 96 kHz) and subtitle data to allow for non interrupted Digital Cinema playback.
7.5.3.7. Capacity
-k
http://www.dcimovies.com/DCI_Digital_Cinema_System_Spec_v1.pdf
3.2. Image Specification
3.2.1. Image Concepts and Requirements
3.2.1.2. Image Structure
The DCDM shall provide an image structure container that consists of either a 2K (2048
x 1080) or 4K (4096 x 2160) image file as defined in Table 1. It is expected that the
image structure shall use one of the two containers such that either the horizontal or
vertical resolution is filled. For example, a 4K image file with a 2.39:1 aspect ratio would
require an image structure of 4096 x 1714, therefore filling the horizontal resolution of
the 4K container. The pixel orientation, as displayed on the screen, shall be understood
to flow from left to right and top to bottom. Also, the horizontal and vertical pixel count
shall begin with 0. For example, the top left pixel of the displayed image shall be
anotated as (0, 0).
3.2.1.7. Bit Depth
The bit depth for each code value for a color component shall be 12 bits. This yields 36
bits per pixel.
3.3. Audio Specification
3.3.1. Audio Concepts and Requirements
Digital Cinema audio requires standardized characteristics, channel mapping and a file
format to successfully playback in a motion picture theater.
3.3.2. Audio Characteristics
3.3.2.2. Bit Depth
The bit depth shall be 24 bits per sample. Material having other bit depths shall be
justified to the most significant bit per [AES3-2003 Section 4.1.1].
3.3.2.3. Sample Rate
Irrespective of the associated image frame rate, the audio sample rate shall be either
forty-eight or ninety-six thousand samples per second per channel, commonly expressed
as 48.000 or 96.000 kHz. At 24 FPS playback, there are exactly 2,000 audio samples
per frame for 48.000 kHz and exactly 4,000 audio samples per frame for 96.000 kHz. At
48 FPS playback, there are exactly 1,000 audio samples per frame for 48.000 kHz and
exactly 2,000 audio samples per frame for 96.000 kHz.
A theater playback system shall have the capability of performing sample rate
conversion as needed.
3.3.2.4. Channel count
The delivered digital audio, contained within the Digital Cinema Package (DCP), shall
support a channel count of sixteen full-bandwidth channels.
4.4. Codestream Specification
...
For a frame rate of 24 FPS, a 2K distribution shall have a maximum of 1,302,083 bytes
per frame (aggregate of all three color components). Additionally, it shall have a
maximum of 1,041,666 bytes per color component per frame.
Note: For information purposes only, this yields a maximum of 250 Mbits/sec total and a
maximum of 200 Mbits/sec per color component.
For a frame rate of 48 FPS, a 2K distribution shall have a maximum of 651,041 bytes per
frame (aggregate of all three color components). Additionally, it shall have a maximum of
520,833 bytes per color component per frame.
Note: For information purposes only, this yields a maximum of 250 Mbits/sec total and a
maximum of 200 Mbits/sec per color component.
A 4K distribution shall have a maximum of 1,302,083 bytes per frame (aggregate of all
three color components). Additionally, the 2K portion of each frame shall satisfy the 24
FPS 2K distribution requirements as stated above.
Note: For information purposes only, this yields a maximum of 250 Mbits/sec total and a
maximum of 200 Mbits/sec per color component.
7.5.3.6. Bandwidth
The storage system is required to provide enough output to support a continuous stream
of 307 Mbits/sec for compressed image, uncompressed audio (16 channels, 24 bit
sample, 96 kHz) and subtitle data to allow for non interrupted Digital Cinema playback.
7.5.3.7. Capacity
-k