Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor | Multi-disciplinary Studies | en_US |
| dc.creator | Lai, Wing-cheung | - |
| dc.identifier.uri | https://theses.lib.polyu.edu.hk/handle/200/4474 | - |
| dc.language | English | en_US |
| dc.publisher | Hong Kong Polytechnic University | - |
| dc.rights | All rights reserved | en_US |
| dc.title | Cell loss concealment coding for ATM video | en_US |
| dcterms.abstract | Loss of video cells in Asynchronous Transfer Mode (ATM) network causes degradation on video quality. Among cell loss concealment methods, the two-layer video coding method matches the priority scheme in the ATM architecture and compatible with video codec available in the existing market. In this report, a two-layer H.261 video coding method is proposed to alleviate cell loss effect on video transmission over ATM network. Two layers of data are produced by the coder according to their importance. The first layer contains important data including coding information, dc component and low frequent coefficients and are transmitted via a guaranteed channel. The second layer consists of less important data including high frequent coefficients and are transmitted via a lossy channel. Pictures are reconstructed based on the first layer data whereas the second layer data is for quality enhancement. Models of layering, packetization, cell loss and burstiness are defined. By the simulation, the performance of the two-layer H.261 video codec is evaluated in terms of the bit rate requirement, picture quality, cost analysis, cell loss ratio and burst length. | en_US |
| dcterms.extent | vii, 71 leaves : ill. ; 30 cm | en_US |
| dcterms.isPartOf | PolyU Electronic Theses | en_US |
| dcterms.issued | 1996 | en_US |
| dcterms.educationalLevel | All Master | en_US |
| dcterms.educationalLevel | M.Sc. | en_US |
| dcterms.LCSH | Asynchronous transfer mode | en_US |
| dcterms.LCSH | Video compression | en_US |
| dcterms.LCSH | Coding theory | en_US |
| dcterms.LCSH | Hong Kong Polytechnic University -- Dissertations | en_US |
| dcterms.accessRights | restricted access | en_US |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| b12306927.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 3.08 MB | Adobe PDF | View/Open |
Copyright Undertaking
As a bona fide Library user, I declare that:
- I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
- I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
- I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.
By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.
Please use this identifier to cite or link to this item:
https://theses.lib.polyu.edu.hk/handle/200/4474