Prioritized transmission of data partitioned H.264 video with hierarchical QAM

Barmada, Bashar; Ghandi, Mohammad Mahdi; Jones, E.V.; Ghanbari, M.

doi:10.1109/lsp.2005.851261

Cited by 90 publications

(77 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Given the same average signal power, increasing α increases the HP protection but decreases the LP protection. Note that three-level protection with 64-HQAM can be quantified similarly, where two distance factors are defined and three priorities, i.e., HP, mid-priority (MP), and LP, are supported [2].…”

Section: A Principles Of Hierarchical Modulationmentioning

confidence: 99%

See 1 more Smart Citation

Hierarchical Space Shift Keying for Unequal Error Protection

Chang¹,

Lin²,

Chung³

2012

IEEE Commun. Lett.

View full text Add to dashboard Cite

Abstract-In this letter, we introduce the concept of enabling unequal error protection (UEP) with space shift keying (SSK)-type modulation that encodes the source information entirely in the antenna indices. Unique characteristics associated with SSKtype modulation as compared with conventional pulse/quadrature amplitude modulation (PAM/QAM) are discussed in the context of UEP design. Three general design concepts for two-level and three-level UEP are presented. Simulation results confirm the multilevel bit protection capabilities of the proposed hierarchical spatial constellation designs.

show abstract

Section: A Principles Of Hierarchical Modulationmentioning

confidence: 99%

“…One common approach to UEP is to employ a nonuniform arrangement of the signal constellation. This approach has been studied for uncoded phase and amplitude modulation, such as phase shift keying (PSK) [1] and pulse/quadrature amplitude modulation (PAM/QAM) [2], [3], as well as for combined coding and modulation [4].…”

mentioning

confidence: 99%

Hierarchical Space Shift Keying for Unequal Error Protection

Chang¹,

Lin²,

Chung³

2012

IEEE Commun. Lett.

View full text Add to dashboard Cite

show abstract

“…With or without an enlarged partition B, protecting partitions A, B, C in an unequal error protection scheme seems sensible. For example, in [8] a combination of hierarchical modulation and forward error protection was applied.…”

Section: Introductionmentioning

confidence: 99%

Congestion Resiliency of Data Partitioned H.264/AVC Video over Wireless Networks

Ali

Moiron

Fleury

et al. 2012

Mobile Multimedia Communications

View full text Add to dashboard Cite

Abstract. Data partitioning is an error resiliency technique that provides unequal error protection for transmission over lossy channels. Including a per-picture, cyclic intra-refresh macroblock (MB) line guards against temporal error propagation. This paper considers the impact of this form of error resilience on access control and proposes a selective dropping scheme based on dropping the partition bearing intra-coded MBs. The paper shows that by this scheme, when congestion occurs, it is possible to gain up to 3dB in video quality prior to transmission over assigning a stream to a single IEEE 802.11e access category. The scheme is shown to be consistently advantageous over other ways of assigning the partitioned data packets to different access categories. This counterintuitive scheme for access control purposes reverses the priority usually given to partition B data packets over partition C data packets.

show abstract

“…Error control coding is used to control the errors, however, the addition of check bits that carry no information further increases the data rate and consequently the bandwidth. [1][2][3][4][5][6] This paper proposes the use of an asymmetric modulation method known as Hierarchical Quadrature Amplitude Modulation (HQAM) for the transmission of images over wireless mobile channels. It is a modification of Quadrature Amplitude Modulation (QAM) and provides unequal error protection (UEP).…”

Section: Introductionmentioning

confidence: 99%

“…This is a simple and efficient approach in which non-uniform signal-constellation is used to give different degrees of protection to the transmitted bits. The advantage of this method is that different degrees of protection are achieved without an increase in bandwidth in contrast to channel coding that increases the data rate by adding redundancy to the transmitted signal [2,[7][8][9]. A comparison of HQAM and QAM is carried out in order to bring out the advantages of HQAM over QAM for transmission of image data over wireless erroneous channels.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Quadrature Amplitude Modulation for Image Transmission over Erroneous Wireless Channels

Kader¹,

Farid²,

Badlishah³

2011

Energy Procedia

View full text Add to dashboard Cite

Abstract-Bit dependency of image compression algorithms introduce error extension effects in transmission of compressed images and considerably reduce the received image quality. Channel coding provides protection against these errors but at the cost of increased bandwidth. Asymmetric modulation methods like QAM and QPSK provide alternative means of equal error protection to all the coded bits without increasing the bandwidth. This paper examines the suitability of Hierarchical QAM (HQAM) where non-uniform signal constellation is used to provide different degrees of protection to the significant and nonsignificant bits in the compressed image data at lower channel Signal to Noise Ratio (SNR) and compares it with that of QAM. The performance of HQAM is evaluated using gray test image for different values of the modulation parameter.

show abstract

Prioritized transmission of data partitioned H.264 video with hierarchical QAM

Cited by 90 publications

References 4 publications

Hierarchical Space Shift Keying for Unequal Error Protection

Hierarchical Space Shift Keying for Unequal Error Protection

Congestion Resiliency of Data Partitioned H.264/AVC Video over Wireless Networks

Hierarchical Quadrature Amplitude Modulation for Image Transmission over Erroneous Wireless Channels

Contact Info

Product

Resources

About