Hierarchical DCT coding of HDTV for ATM networks

Lee, D.-S.; Tzou, Kou-Hu

doi:10.1109/icassp.1990.116018

Cited by 18 publications

(5 citation statements)

References 9 publications

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“…Recently, similar interpolation methods have been studied and have shown some local improvement in reducing the visibility of degradation due to cell losses, but the degradation was still noticeable in both methods [19]. Results obtained in our experiments, using a two-layer H.261-based codec, support this statement.…”

Section: B Temporal Extrapolation-spatial Interpolationsupporting

confidence: 90%

Cell-loss concealment in ATM video codecs

Ghanbari

Seferidis

1993

IEEE Trans. Circuits Syst. Video Technol.

144

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In this paper methods for the interpolation of lost cells in asynchronous-transfer-mode (ATMI networks are studied. It is shown that use of motion-compensated previous frames gives the best results. The quality of the interpolated pictures improves if the motion vectors truly represent the actual motion in the scene. This is only possible with a two-layer coding scheme, where the motion vectors can be delivered to the decoder through the base-layer guaranteed channel. In derivation of the motion vectors at the encoder, use of uncoded input picture frames outperforms the conventional method of motion extraction from the previous coded pictures, despite the lower bit rate of the latter to the former. Depending on the quality of the base layer and the scene activity, the signal-to-noise ratio (SNR) in the cell-loss-interpolated areas can be improved by up to 10 dB.

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Section: B Temporal Extrapolation-spatial Interpolationsupporting

confidence: 90%

Cell-loss concealment in ATM video codecs

Ghanbari

Seferidis

1993

IEEE Trans. Circuits Syst. Video Technol.

144

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“…By careful design, the first (or first few) components in the hierarchy can be a good approximation to the overall signal, providing a good first impression of the information without requiring all the components to be received (and decoded) first. LC has advantages in many facets of image and video transmission [5][6][7].…”

Section: Layered Codingmentioning

confidence: 99%

“…Two-layer coding has been mostly considered in the literature [2,5,7,12,13], with the first coarse or low frequency subsignal usually referred to as the base layer, and the second, higher resolution subsignal termed the enhancement layer.…”

Section: Layered Codingmentioning

confidence: 99%

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Multi-resolution Layered Coding for Real-Time Image Transmission: Architectural and Error Control Considerations

Han

Polyzos

1998

Real-Time Imaging

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“…On the other hand, a video coder would group the compressed data into different priority levels according to their visual importance and pack information with corresponding priority labels. A two -level priority has been simulated in [6]. The system groups low -order DCT coefficients as high -priority data and groups high -order coefficients as low -priority data.…”

Section: Effects Of Transmission Error and Cell Loss On Compressed Videomentioning

confidence: 99%

Digital Advanced TV For Broadband Networks

Bellisio¹,

Fleischer²,

Tzou³

1990

Fiber Networking and Telecommunications

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The Broadband Integrated Services Digital Network (BISDN) is a new concept for exchange area communications. Based on lightwave technology, high -speed circuit and packet switching, and intelligent networking, BISDN will integrate services such as voice, data, video, LAN (Local Area Network), and MAN (Metropolitan Area Network) under the same umbrella as POTS (Plain Old Telephone Service). Among various components of the BISDN, the cell -based ATM (Asynchronous Transfer Mode) multiplexing technique is a powerful vehicle for providing integrated services effectively. Among various services envisaged for BISDN, high -quality video may be the most attractive new service for the majority of residential customers. Therefore, the digital coding of high -quality video signals in a form suitable for transmission through the proposed BISDN network is of great interest and importance. The coding of ATV (advanced television) for digital transmission is of particular importance since it may represent the most viable means for avoiding transmission impairments and delivering very high image quality. The target rate for the coding of the ATV signal is the currently proposed CCITT H4 rate of roughly 135 Mbps, which is the BISDN payload of the SONET channel. In this paper, we review the structure of the BISDN and effective digital coding of ATV at about 135 Mbps. We also address issues related to transmission of compressed ATV over the cell -based ATM networks. BROADBAND DIGITAL NETWORKSAdvances in lightwave technology and high -speed circuits can realize very wide bandwidths in a single fiber. Using this high capacity, it is possible to combine data representing various services and transmit them on a single fiber. The Broadband Integrated Services Digital Network (BISDN) is intended to be the unified long -term solution to the telecommunication needs of the information era that will efficiently integrate the provision of a wide variety of services. Among these are services based on the transport of voice, data, and video, as well as LAN (Local Area Network), and MAN (Metropolitan Area Network) interconnects. BISDN will be implemented by connecting one or more single -mode fibers to each customer site. It is crucial that the overall system be designed with the ability to evolve as network technology progresses and be capable of providing increasingly sophisticated services.Currently one of the most attractive physical (and logical) optical fiber distribution architectures for BISDN appears to be the final star topology. A block diagram of the system architecture is shown in Figure 1. In this architecture, a remote connecting point, which may be at the curbside or at a more elaborate Remote Electronics (RE) site, is used to concentrate traffic from residential and small business customers and also to distribute traffic to them. The RE traffic is then connected, along with two -way traffic from large business customers, to Central Offices (CO). A principal motivation for choosing a dedicated fiber (or pair of fibers) for each cus...

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Hierarchical DCT coding of HDTV for ATM networks

Cited by 18 publications

References 9 publications

Cell-loss concealment in ATM video codecs

Cell-loss concealment in ATM video codecs

Multi-resolution Layered Coding for Real-Time Image Transmission: Architectural and Error Control Considerations

Digital Advanced TV For Broadband Networks

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