title: Ensuring quality of service for image transmission: hybrid loss protection.
abstract: We present hybrid loss protection as a new channel coding and packetization scheme for image transmission over nonprioritized lossy packet networks. The scheme employs an interleaver-based structure, and attempts to maximize the expected peak signal-to-noise ratio (PSNR) at the receiver given the constraint that the probability of failure, i.e., the probability that the PSNR of the decoded image is below a given threshold, is upper-bounded by a user-defined value. A new code-allocation algorithm is proposed, which employs Gilbert-Elliot modeling of the network statistics. Experimental results are provided in the case of transmission of images encoded by SPIHT and JPEG 2000 over a wireline, as well as a wireless UMTS-based Internet connection.
authors.affiliation: Center for Multimedia Radio Communications (CERCOM), Dipartimento di Elettronica, Politecnico di Torino, Abruzzi 24-10129, Torino, Italy. grangetto@polito.it
authors.forename: Marco
authors.initials: M
authors.lastname: Grangetto
authors.forename: Enrico
authors.initials: E
authors.lastname: Magli
authors.forename: Gabriella
authors.initials: G
authors.lastname: Olmo
mesh_terms: D000465:Algorithms; D003195:Computer Communication Networks; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D016247:Information Storage and Retrieval / Q000379:methods*; D011785:Quality Assurance, Health Care / Q000379:methods*; D011786:Quality Control; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity