Table 3 The log spectral distortion for various bit rates (variable rate coding scheme).
H.264 also provides flexibility in serving broad range of video applications by supporting various bit rates and resolutions [1].
We use the ITU-T P.862 PESQ standard [31] to compare the quality of synthesized speech at various bit rates.
Therefore, we have just used PESQ for quality comparison between various bit rates and not for an estimate of MOS.
Scalable speech coding refers to the coding schemes that reconstruct speech at different levels of accuracy or quality at various bit rates.
It can be applied to a wide variety of applications with various bit rates and video streaming resolutions, intending to cover practically almost all the aspects of audio and video coding processing within its framework [5 7].
Figure 1 Various bit-rate transcoding techniques.
In order to study the performance of the proposed controller, it is simulated under various variable bit rate traffic patterns and the results obtained are evaluated in terms of network utilization.
Afterwards, since the proposed system is designed for user authentication under error-prone transmissions, the case of mobile networks is further studied as a typical example, and the system's resistance is investigated under different JPEG compression ratios and various bit error rates (BERs).
Accordingly, the satisfied settings for video encoding are usually for QCIF and for SIF/CIF with various low bit rates, for example, 90 Kbps for QCIF and 150 Kbps for SIF/CIF, to maximize the perceived video quality [40, 41].
In this paper, we have designed a model of FSO system using R Soft simulator to establish an FSO link by a range of 10 km with BER ∼10−6 achieved and reported analysis of various parameter like bit rate, wavelength, transmission power and transmission length.
