M. Krunz et al., STUDY OF VER MPEG-CODED VIDEO TRAFFIC AND ASSOCIATED MULTIPLEXING PERFORMANCE, Computer systems science and engineering, 11(3), 1996, pp. 135-143
Citations number
14
Categorie Soggetti
System Science","Computer Application, Chemistry & Engineering","Computer Sciences, Special Topics","Computer Science Theory & Methods
This paper presents a study of the statistical characteristics and mul
tiplexing of variable-bit-rate (VBR) MPEG-coded video streams. Our res
ults are based on 23 minutes of video obtained from the entertainment
movie 'The Wizard of Oz'. The experimental setup which was used to cap
ture, digitize and compress the video stream is described. A particula
r significance of our data is that it contains the three types of MPEG
frames, namely Intra-coded (I), Prediction (P) and Bidirectional (B)
frames. Although the study is conducted at the frame level (as opposed
to the slice level), it is observed that the inter-frame correlation
structure for the frame size sequence involves complicated forms of ps
eudo-periodicity that are mainly determined by the compression pattern
of the frames. We study the distribution of the frame size (i.e. the
number of cells per frame). For each frame type, it is shown that a lo
gnormal distribution is an appropriate fit for the frame size histogra
m. Simulations are used to study the performance of an ATM multiplexer
for MPEG streams. Results from these simulations indicate that a sign
ificant gain in cell loss performance is obtained when MPEG video stre
ams are statistically multiplexed.