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Video Transmission for Third Generation Wireless Communication Systems

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ABSTRACT

This paper presents a twin-class unequal protected video transmission system over wireless channels. Video partitioning based on a separation of the Variable Length Coded (VLC) Discrete Cosine Transform (DCT) coefficients within each block is considered for constant bitrate transmission (CBR). In the splitting process the fraction of bits assigned to each of the two partitions is adjusted according to the requirements of the unequal error protection scheme employed. Subsequently, partitioning is applied to the ITU-T H.263 coding standard. As a transport vehicle, we have considered one of the leading third generation cellular radio standards known as WCDMA. A dual-priority transmission system is then invoked on the WCDMA system where the video data, after being broken into two streams, is unequally protected. We use a very simple error correction coding scheme for illustration and then propose more sophisticated forms of unequal protection of the digitized video signals. We show that this strategy results in a significantly higher quality of the reconstructed video data when it is transmitted over time-varying multipath fading channels.

No MeSH data available.


The frame structure definitions for WCDMA uplink DPDCH/DPCCH.
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f3-j62gar: The frame structure definitions for WCDMA uplink DPDCH/DPCCH.

Mentions: The frame structure for the uplink DPCCH/DPDCH channel is shown in Fig. 3. The basic parameters for uplink framing are the same as the downlink. The only difference is that the DPDCH and DPCCH are not time multiplexed. Figure 4 shows the uplink DPCCH/DPDCH transmit processing for one channel. Unlike the forward channel, the DPDCH and DPCCH are transmitted in parallel and are separated using different channelization (spreading) codes. Also, the reverse transmissions carry feedback information bits (FBI).


Video Transmission for Third Generation Wireless Communication Systems
The frame structure definitions for WCDMA uplink DPDCH/DPCCH.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4862809&req=5

f3-j62gar: The frame structure definitions for WCDMA uplink DPDCH/DPCCH.
Mentions: The frame structure for the uplink DPCCH/DPDCH channel is shown in Fig. 3. The basic parameters for uplink framing are the same as the downlink. The only difference is that the DPDCH and DPCCH are not time multiplexed. Figure 4 shows the uplink DPCCH/DPDCH transmit processing for one channel. Unlike the forward channel, the DPDCH and DPCCH are transmitted in parallel and are separated using different channelization (spreading) codes. Also, the reverse transmissions carry feedback information bits (FBI).

View Article: PubMed Central - PubMed

ABSTRACT

This paper presents a twin-class unequal protected video transmission system over wireless channels. Video partitioning based on a separation of the Variable Length Coded (VLC) Discrete Cosine Transform (DCT) coefficients within each block is considered for constant bitrate transmission (CBR). In the splitting process the fraction of bits assigned to each of the two partitions is adjusted according to the requirements of the unequal error protection scheme employed. Subsequently, partitioning is applied to the ITU-T H.263 coding standard. As a transport vehicle, we have considered one of the leading third generation cellular radio standards known as WCDMA. A dual-priority transmission system is then invoked on the WCDMA system where the video data, after being broken into two streams, is unequally protected. We use a very simple error correction coding scheme for illustration and then propose more sophisticated forms of unequal protection of the digitized video signals. We show that this strategy results in a significantly higher quality of the reconstructed video data when it is transmitted over time-varying multipath fading channels.

No MeSH data available.