User`s guide

56 Creating DTV Clips
Encoding Your Content
The following sections describe the specifications and constraints for DTV clips
on the DVMHD.
Transport Stream
The transport stream should be created according to ISO/IEC 13818-1 and
within the following constraints:
Parameter Value
Minimum Bitrate 10Mb/s
Maximum Bitrate 50Mb/s
NOTE: There can only be one transport stream within the multiplex. The
DVMHD will play the first transport stream encountered in the file.
Video Streams
The video elementary streams within the transport stream should be created
according to ISO/IEC 13818-2 Main Profile High Level and the within
following constraints:
Format Size Chroma
Format
Aspect
Ratio
Scan
Type
Frame Rates
1080i
(Note 1)
1920x1080 4:2:0 16x9 Interlaced 23.976,24, 25
29.97, 30
720p
(Note 2)
1280x720 4:2:0 16x9 Progressive 50, 59.94, 60
480p
720x480 4:2:0 4x3 Progressive 59.94
NTSC
720x480 4:2:0 4x3 Interlaced 29.97
PAL
720x576 4:2:0 4x3 Interlaced 25
Note 1: All 1080i encodings are displayed at either 25, 29.97 or 30fps.
Note 2: All 720p encodings are displayed at either 50, 59.94 or 60fps.
Audio Streams
The video elementary streams within the transport stream should be created
according to the Dolby Digital AC-3 or MPEG-1 specification and the following
constraints:
Sample Rate Main Service Associated Service Total Bitstream
48Khz
≤ 384kbps ≤ 128kbps ≤ 512kbps