Título
Error concealment method for HEVC based on motion vector redundancy
Autor
Domingo Guzman
Colaborador
CLAUDIA FEREGRINO URIBE (Asesor de tesis)
ALICIA MORALES REYES (Asesor de tesis)
Nivel de Acceso
Acceso Abierto
Materias
HEVC - (HEVC) Error concealment - (OCULTAMIENTO DE ERRORES) Coding unit - (UNIDAD DE CODIFICACIÓN) Motion vector - (VECTOR DE MOVIMIENTO) Inter coding - (INTER CODIFICACIÓN) CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA - (CTI) MATEMÁTICAS - (CTI) CIENCIA DE LOS ORDENADORES - (CTI) DISPOSITIVOS DE CONTROL - (CTI)
Resumen o descripción
Several video compression standards have been produced with the aim of reducing transmission bit rates without decreasing the video quality. The High Effciency Video Coding (HEVC) standard, developed by the Joint Collaborative Team on Video Coding (JCT-VC), is characterized by delivering improved coding efficiency relative to previous standards, such as H.264/AVC. HEVC provides improved compression ratios mainly for High Definition (HD) and Ultra High Definition (UHD) video, however, such gains are associated with high increases in computational complexity and therefore long processing times. Due to the characteristics of the HEVC design, it is shown that the temporal and spatial dependency of motion information is higher than in the H.264/AVC standard, producing a lack of robustness against the loss of information caused by transmission errors or data losses in storage. Based on the above, current error concealment methods might not be prepared to work with these new features. This work addresses the development of an Error Concealment (EC) method for improving the resilience of the HEVC standard, backing up a set of intra coded Coding Units (CUs), including its corresponding motion information and partitioning. CUs are selected by choosing quad-tree structures and PU shapes with lower partitioning depth, because losing larger structures represent a signi_cant degradation of the visual quality, and then transmitted as redundancy. Redundant information is embedded in a reversible way introducing no visible distortion within Discrete Cosine Transform (DCT) coefficients. A lost CU could be restored using the backup structure and motion information at the decoding stage or could be restored through a generic structure choosing between neighboring candidates through the use of the Outer Boundary Matching Algorithm (OBMA), in situations where the coding unit and its backup information gets lost. Simulations show that the proposed method can efficiently restore lost CUs using redundant motion information, improving error resilience up to 3 dB in Peak
Signal-to-Noise Ratio (PSNR) and quality when compared to the related proposal in state of the art at the frame level, and up to 4 dB compared to the original HEVC standard without redundant embedded information.
Editor
Instituto Nacional de Astrofísica, Óptica y Electrónica
Fecha de publicación
febrero de 2018
Tipo de publicación
Tesis de maestría
Versión de la publicación
Versión aceptada
Recurso de información
Formato
application/pdf
Idioma
Inglés
Audiencia
Estudiantes
Investigadores
Público en general
Sugerencia de citación
Guzmán Estrada, D. (2018). Error concealment method for HEVC based on motion vector redundancy, Tesis de Maestría, Instituto Nacional de Astrofísica, Óptica y Electrónica.
Repositorio Orígen
Repositorio Institucional del INAOE
Descargas
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