Extron Electronics JPEG 2000 Encoder - Manual (Page 34)

Reference
This section provides reference information regarding the encoding and packaging processes
when creating content for the JMP 9600 JPEG 2000 Media Player. Topics that are covered
include:
z Encoding and Packaging Overview
z Encoding Related Specifications
z
Part Numbers
Encoding and Packaging Overview
Creating content for the JMP 9600 using the JPEG 2000 Encoder is accomplished in three
stages: encoding, wrapping, and packaging, as shown in
figure 19 .
a.wav
J2C
Frame
J2C
Frame
... J2C
Frame
Image
Frame
Image
Frame
... Image
Frame
JPEG 2000
Compressor
Encoding
MXF Wrap
Wrapping
JPEG 2000 Encoding Software
Packaging
a.mxf
DCP
Packaging v.mxf
a.mxf
v.mxf
Asset
Map
Composite
Playlist
Packing
List MXF Wrap
Figure 19. Encoding, Wrapping, and Packaging Process
z
Encoding — Each frame of source video is compressed by passing the raw pixel data
through a JPEG 2000 compressor. The compressor creates a stream of JPEG 2000-coded
frames. The parameters that are applied in the JPEG 2000 Encoder software affect the
compression level and quality of the image.
The source audio is encoded using pulse code modulation (PCM).
z Wrapping — The individual compressed video frames are combined into a single track
file using the Material Exchange Format (MXF). The audio is converted into a separate
MXF track file.
z Packaging — Additional control files describing the format of, and the relationship
between, the audio and video files are generated. The resulting files are collectively
known as a Digital Cinema Packagte (DCP) as described in the DCI specification.
Video Track Files
A video track file is the smallest unit of video in the system. It is an MXF container that has
all of the compressed video data and associated meta-information necessary to recreate a
piece of video (for example, see the v.mxf file shown in
figure 19 ).
The JMP 9600 supports unencrypted frame-wrapped video track files that conform to
SMPTE 377M-2004 and SMPTE 422M-2006 standards.
JPEG 2000 Encoder • Reference 30