Information Technology Reference
In-Depth Information
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Bit-rate (bits/s)
H.264/AVC Intra
Bit-rate (bits/s)
Motion JPEG 2000
H.264/AVC Intra
Motion JPEG 2000 Field
Motion JPEG 2000 Frame
720p50, 2 nd encoding-decoding cycle
1080i25, 2 nd encoding-decoding cycle
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105000000
Bit-rate (bits/s)
H.264/AVC Intra
Bit-rate (bits/s)
Motion JPEG 2000
H.264/AVC Intra
Motion JPEG 2000 Field
Motion JPEG 2000 Frame
720p50, 4 th encoding-decoding cycle
1080i25, 4 th encoding-decoding cycle
Fig. 13 Recompression loss for IntoTree sequence
H.264/AVC's macroblock-oriented processing is considered to be very beneficial
as it allows to preserve locality of reference, which can lead to improved cache
usage. Motion JPEG 2000 on the other hand uses a global transform, which makes
block-based implementation more difficult. However, solutions for this problem
have been proposed in the literature. An overview is given in [21].
6 Conclusions
In this work, we have investigated formats for the digital representation of HD
video material. Concerning the choice between 720p and 1080i HD formats, we
have shown that, from a technical point of view, 720p is clearly superior to 1080i.
However, in practice, other factors, such as the larger availability of material in
1080i format and the better support for 1080i in current production equipment,
may lead to the adoption of the latter format. Besides the choice between 720p and
1080i, the selection of the video compression format for HD recording and pro-
duction was discussed. We have evaluated two state-of-the-art intra-only compres-
sion formats, Motion JPEG 2000 and H.264/AVC Intra. In terms of compression
performance, H.264/AVC Intra outperforms Motion JPEG 2000 when recompres-
sion is not considered. However, Motion JPEG 2000 clearly outperforms
H.264/AVC Intra when applying successive encoding-decoding cycles, typically
performed in television production. The results have also shown that frame coding
 
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