Variable Bit Rate Video Coding In Atm Networks

Verbiest, W.; Pinnoo, L.; Voeten, B.

doi:10.1117/12.969048

Cited by 4 publications

(1 citation statement)

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“…Both the p*64 and MPEG standards use the DCT, but both also use other methods which help remove temporal redundancy. In addition to the above methods, variable bit rate coding techniques have been used to take advantage of the burstiness of video sources and statistical multiplexing capability of asynchronous transfer mode (ATM) networks [11], [29], [37]. Other researchers have looked into the use of subband coding [10], [18], [25], [30] and wavelets for image compression [2], [3], [8], [40].…”

Section: Introductionmentioning

confidence: 99%

Enhancing videoconferencing using spatially varying sensing

Basu

Wiebe

1998

IEEE Trans. Syst., Man, Cybern. A

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Abstract-Human vision can be characterized as a variable resolution system-the region around the fovea (point of attention) is observed with great detail, whereas the periphery is viewed in lesser detail. In this work, we show that spatially varying sensing (resembling the human eye) can indeed be useful in videoconferencing. A system that can incorporate multiple and moving foveae is described. There are various possible ways of implementing multiple foveae and combining information from them. Some of these alternative strategies are discussed and results are compared. We also show the advantage of using spatially varying sensing as a preprocessor to JPEG. The methods described here can be useful in designing teleconferencing systems and image databases.

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Section: Introductionmentioning

confidence: 99%

Enhancing videoconferencing using spatially varying sensing

Basu

Wiebe

1998

IEEE Trans. Syst., Man, Cybern. A

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Intelligence in ATM terminals

Hellemans¹,

Decuypere²

1991

Int. j. digit. analog commun. syst.

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In this paper we propose to migrate the intelligence for telecommunication services from the network into the terminals. In the first three sections we elaborate on the approach taken. The descending cost of processing equipment and the increased flexibility offered by ATM networks open new perspectives for the terminal business. In addition, only limited services will be offered by early ATM networks. Terminal‐based intelligence may overcome this initial gap. The physical configuration of such a terminal is presented in Section 4. In Section 5 the functional configuration of the terminal is proposed. The control module realizes a generic platform for the execution of telecommunication applications. This platform gives access both to local peripherals and to the telecommunication services offered by the network. The top layer consists of the telecommunication applications. In Section 6 a number of these applications are discussed. The remote execution application is of special interest since it gives remote access to telecommunication applications hosted on other IATs, so enlarging the capabilities of the local IAT.

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A new data structure for variable bit rate broadcast video transmission on ATM network

Modena¹,

Parladori²,

Vecchietti³

1991

Trans Emerging Tel Tech

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The asynchronous transfer mode (ATM) technique will probably increase the demand for sophisticated video services. The availability of wide bandwidth and fast rerouting at affordable rates will influence the design of new video codecs. Firstly, variable bit rate coding algorithms can efficiently be employed in order to achieve a uniform picture quality at the receiver. Secondly, the impairment due to cell loss that may occur in the ATM environment demands specialized error concealment strategy. In this paper the segmentation and reassembling of the bit stream generated by a hybrid DCT broadcast quality video codec is addressed. A VIDEO PACKET (V.P.), composed of a variable number of ATM cells, is associated to a defined portion of the television signal. Predefined patterns and layered protection included in the V.P. allow the detection of lost cells and consequently the application of a simple error concealment technique.

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Variable Bit Rate Video Coding In Atm Networks

Cited by 4 publications

References 0 publications

Enhancing videoconferencing using spatially varying sensing

Enhancing videoconferencing using spatially varying sensing

Intelligence in ATM terminals

A new data structure for variable bit rate broadcast video transmission on ATM network

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