# Transmitter Diversity Gain Technique Aided Irregular Channel Coding for Mobile Video Transmission
## 6 Results and Discussion
### Subjective and Objective Performance Analysis  
Subjective and objective techniques are widely used for measuring the video quality. Human participants are required in the subjective technique to assess the streaming quality and, therefore, it is a time-consuming solution. On the other hand, different methods are used in objective measures, such as BER and Peak Signal to Noise Ratio (PSNR). PSNR is a valid metric for measuring the video quality when the video contents and codecs remain unchanged [48]. For simulation purposes, the \"AKIYO\" video sequence, having extremely low dynamism and having fine details in the background, is utilized and encoded using H.264/AVC JM 19 video codec. Because of the low dynamism of the video sequence and the considered low-bit-rate videophone scenario, the Flexible Macroblock Ordering (FMO) error-resilient technique is turned off to reduce the computational complexity of the considered real-time video communication system scenario. Furthermore, the considered video sequence consists of 45 frames having a QCIF (176 \(\times\) 144) pixel format with a temporal resolution of 15 frames per second (fps). The arrangement of the Intra-coded I-frame is one out of 44 predicted P-frames. In order to limit the error propagation within the frame boundaries, each frame is subdivided into nine slices, while each slice consisting of 11 macroblocks. Moreover, only one reference frame is used in the inter-frame prediction instead of multiple reference frames in order to keep lower the complexity of the employed video coding setup. The number of profitable iterations is set to seven in the iterative decoding operation. Monte Carlo simulations were carried out using 45 frames of the \"AKIYO\" video sequence and the experiments were repeated 260 times and the average results are considered. The performance of the three different error protection schemes, which include REP scheme, Irregular Error Protection scheme-1 (IREP-1), and Irregular Error Protection scheme-2 (IREP-2) listed in table-II, are evaluated and compared. The REP scheme uses Uni-code IRCC by only employing the rate-3/4 subcode of the constituent IRCC code for all three partitions, while for IREP-1 and IREP-2, a subset of the 17 subcodes of the employed IRCC is utilized. Using Multi-code IRCC, the source coded streams are irregular error protected, depending on the code-rate of the constituent sub-code. In IREP-1, the concatenation order of [A-B-C] is followed. As a result, in IREP-1, type A partition is pro  
Figure 5: EXIT curves of the three different error protected schemes. vided with the highest error protection as compared to both type B and C partitions, while the type B partition has high error protection than partition C. Similarly, the concatenation order [B-A-C] is considered in IREP-2. In the concatenation order [B-A-C], type B partition has higher protection when compared to the other two partitions i.e., type A and type C and type A is protected more than type C partition. Figure 6 presents the BER performance of the employed error protection schemes, employing IRCC and URC in iterative channel decoding fashion and while using SP modulation aided DSTS mechanism for the transmission of H.264/AVC coded \"AKIYO\" video sequence. In Figure 6, the BER for all three schemes are plotted with varying \(E_{b}/N_{0}\) value and maintaining the overall bit-rate consistent, while transmitting the considered \"AKIYO\" video sequence.