Multiresolution broadcast for digital HDTV using joint source/channel coding

Ramchandran, Kannan; Ortega, Antonio; Uz, K.M.; Vetterli, Martin

doi:10.1109/49.210540

Cited by 252 publications

(53 citation statements)

References 17 publications

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“…where ξ rx represents the MSE between the source and decoded symbols given by (3). In this work, system performance is measured in terms of the SDR with respect to the SNR at reception, which depends of the distance to the transmitter.…”

Section: Resultsmentioning

confidence: 99%

“…Different approaches have been considered to decode the source data at the receivers with different resolutions or distortion levels, such as hierarchical modulations and embedded channel codes [3]. Another strategy is multilayer Hybrid Digital-Analog (HDA) where coarse information is encoded using digital schemes to ensure all the receivers are able to decode at least that information, while the quantizer errors are directly transmitted to refine the source estimates in the best receivers.…”

Section: Introductionmentioning

confidence: 99%

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Hybrid digital-analog joint source channel coding for broadcast multiresolution communications

Fresnedo

Suárez-Casal

Castedo

et al. 2017

2017 25th European Signal Processing Conference (EUSIPCO)

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Abstract-Multilayer coding represents an appealing solution for the broadcasting of common data when we want to ensure the receivers decode the signal with different distortion levels depending on the quality of the received signal. In addition, the combination of digital and analog techniques to encode the source data allows to solve the limitation of these approaches when they are applied separately. In this work, we consider a Hybrid Digital-Analog (HDA) multilayer system where the digital layers are employed to satisfy different Quality of Service (QoS) requirements and an analog layer refines the estimates of the source symbols. The resulting scheme provides good performance for different expansion factors and number of layers, and it also presents good scaling for all SNR values.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hybrid digital-analog joint source channel coding for broadcast multiresolution communications

Fresnedo

Suárez-Casal

Castedo

et al. 2017

2017 25th European Signal Processing Conference (EUSIPCO)

View full text Add to dashboard Cite

show abstract

“…ii) Distortion due to HR mapping: Performance degradation is observed by a QPSK receiver when it receives a hierarchical constellation. For the HR constellation, the signal power constitutes of two components: basic QPSK constellation power (2d 1 2 ) & the overriding QAM constellation power (2d 1 2 2 ). The ratio of the intra-region (satellite) mapping distance (2d 2 ) and the inter-region (cloud) mapping distance (2d 1 ) is denoted as parameter which is held at a constant value.…”

Section: End-to-end Distortionmentioning

confidence: 99%

A Two Tier QoS Provisioning Scheme for Satellite based Multimedia Communication

Kotia¹,

Dasgupta²,

Desai³

2011

IJCA

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This paper suggests a generic scheme for provisioning of QoS under largely fluctuating channel quality and flat fading conditions for multimedia communication over satellite. A resolution scalable source is matched to a hierarchical constellation in order to achieve an adaptive decoding capability to combat fluctuations in signal to noise ratio (SNR). The receiver estimates the SNR and if the SNR is found to be below a certain threshold, it reduces the rate by dropping off a higher order constellation which is riding on a baseline QPSK constellation. Thus, the first tier of the scheme guarantees service at lower resolution in poor channel conditions. The second tier of the scheme facilitates near coherent demodulation under frequency nonselective fading conditions. It makes use of pilot symbols which are embedded in the information symbols to probe the fading channel.The received pilots provide an estimate of multiplicative distortion encountered in slow & flat fading channel. This estimated amplitude and phase reference are used to adjust the level and angle of the incoming symbols to the reference constellation. This receiver based rate adaptation scheme is typically suitable for broadcast applications and addresses the issue of service quality provision for a multitude of receivers. It provides a stable reference for demodulation under fading and supports graceful degradation for deteriorating channel conditions. Exhaustive simulations are carried out to examine the validity of the concept. General TermsJoint source and channel coding (JSCC)

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“…While Shannon theory for the separation of source coding from channel coding hold only for point to point communication system [1]. For Multichannel environment Cover [2] have established that the best scenarios are multiresolution or embedded in character.…”

Section: Introductionmentioning

confidence: 99%

A Multiresolution Channel Decomposition for H.264/AVC Unequal Error Protection

Abbadi¹,

Abbadi²

2012

JSIP

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The most commonly used transmission channel in nowadays provides the same level of protection for all the information symbols. As the level of protection should be adequate to the importance of the information set, it is justified to use UEP channels in order to protect information of variable importance. Multiresolution channel decomposition has emerged as a strong concept and when combined with H.264/AVC layered multiresolution source it leads to outstanding results especially for mobile TV applications. Our approach is a double multiresolution scheme with embedded constellation modulations on its baseband channels followed by OFDM time/frequency multiresolution passband modulation. The aim is to protect The NAL units carrying the most valuable information by the coarse constellations into coarse sub-channels, and the NAL units that contain residual data by fined constellations and transposed into the fined OFDM sub-channels. In the multiresolution protection coding, our approach is a multiresolution decomposition of the core convolutional constituent of the PCCC where the NAL units carrying the most valuable information are coded by the rugged coefficient of the multiresolution code and the NAL units that contains residual data are coded by refined less secure coding coefficients.

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Multiresolution broadcast for digital HDTV using joint source/channel coding

Cited by 252 publications

References 17 publications

Hybrid digital-analog joint source channel coding for broadcast multiresolution communications

Hybrid digital-analog joint source channel coding for broadcast multiresolution communications

A Two Tier QoS Provisioning Scheme for Satellite based Multimedia Communication

A Multiresolution Channel Decomposition for H.264/AVC Unequal Error Protection

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