公开(公告)号：SG148844A1

公开(公告)日：2009-01-29

申请号：SG2005050216

申请日：2002-02-08

Applicant: NOKIA CORP

Inventor： HANNUKSELA MISKA ,  AKSU EMRE BARIS

IPC: G06F5/06 ,  H04J3/26 ,  H04L12/861 ,  H04L13/08 ,  H04L29/06 ,  H04N7/24 ,  H04N21/44 ,  H04N21/658 ,  G06F13/38 ,  H04L12/56 ,  H04N7/15

Abstract: METHOD AND SYSTEM FOR BUFFERING STREAMED DATA The invention discloses a method of improving the playback of streamed media on a client device by overcoming problems caused by variations in the transmission delay of packets due to network and transport protocol operation and variations in encoding/server specific delays. In an embodiment of the invention, a client device has a decoder (120) and a pre-decoder buffer (110) which receives streamed packets from source server via a packet network. The pre-decoder buffer is variable in size and has a variable initial buffering time for receiving the transmitted packets from the source server prior to decoding in the decoder. The initial buffering time and pre-decoder buffer size can be dynamically adapted for improved playback performance by the source server. In a further aspect of the invention, a post-decoder buffer operates in conjunction with the pre-encoder buffer to reduce decoding- related delay variations.

公开(公告)号：MX2008012354A

公开(公告)日：2008-10-09

申请号：MX2008012354

申请日：2007-03-27

Applicant: NOKIA CORP

Inventor： HANNUKSELA MISKA ,  WANG YE-KUI

IPC: H04N7/24

Abstract: El uso de un delimitador de imagen que está contenido en un valor de tipo unidad NAL que está reservado en la especificación AVS o SVC actual. La presente invención proporciona la información de escalabilidad para la capa base H.264/AVC en tal forma que las corrientes de bits permanecen decodificadas con decodificadores H.264/AVC. Además, el delimitador de imagen de la presente invención pueden contener muchos elementos de sintaxis que pueden ayudar al facilitar el procesamiento de corrientes de bits comparado con la sintaxis de corriente de bits H.264/AVC.

公开(公告)号：CA2673494A1

公开(公告)日：2008-04-24

申请号：CA2673494

申请日：2007-10-15

Applicant: NOKIA CORP

Inventor： LAINEMA JANI ,  UGUR KEMAL ,  HANNUKSELA MISKA

IPC: H04N7/26 ,  H04N13/00

Abstract: A system and method for enabling parallel decoder implementation for diff erent views, even when there are existing dependencies between views. In var ious embodiments of the present invention, information is signaled to a deco der that slices are coded using certain constraints, so that parallel decodi ng of slices is possible. This signaling can be performed at a sequence para meter set level, or it could be performed at picture parameter set level, sl ice header level or macroblock header level. Additionally, the delay between various views is also signaled to the decoder, at the same location as the constraint information in various embodiments. Various algorithms can also b e used to improve the coding efficiency of the system.

公开(公告)号：AU2007311489A1

公开(公告)日：2008-04-24

申请号：AU2007311489

申请日：2007-10-17

Applicant: NOKIA CORP

Inventor： WANG YE-KUI ,  HANNUKSELA MISKA ,  CHEN YING

IPC: H04N7/26

Abstract: An improved system and method for implementing efficient decoding of scalable video bitstreams is provided. A virtual decoded picture buffer is provided for each lower layer of the scalable video bitstream. The virtual decoded picture buffer stores decoded lower layer pictures for reference. The decoded lower layer pictures used for reference are compiled to create a reference picture list for each layer. The reference picture list generated by the virtual decoded picture buffer is used during a direct prediction process instead of a target reference list to correctly decode a current macroblock.

公开(公告)号：FI118830B

公开(公告)日：2008-03-31

申请号：FI20010239

申请日：2001-02-08

Applicant: NOKIA CORP

Inventor： HANNUKSELA MISKA ,  AKSU EMRE

IPC: G06F5/06 ,  H04J3/26 ,  H04L12/861 ,  H04L13/08 ,  H04L29/06 ,  H04N7/24 ,  H04N21/44 ,  H04N21/658

Abstract: The invention discloses a method of improving the playback of streamed media on a client device by overcoming problems caused by variations in the transmission delay of packets due to network and transport protocol operation and variations in encoding/server specific delays. In an embodiment of the invention, a client device has a decoder (120) and a pre-decoder buffer (110) which receives streamed packets from source server via a packet network. The pre-decoder buffer is variable in size and has a variable initial buffering time for receiving the transmitted packets from the source server prior to decoding in the decoder. The initial buffering time and pre-decoder buffer size can be dynamically adapted for improved playback performance by the source server. In a further aspect of the invention, a post-decoder buffer operates in conjunction with the pre-encoder buffer to reduce decoding-related delay variations.

公开(公告)号：CA2661578A1

公开(公告)日：2008-02-28

申请号：CA2661578

申请日：2007-08-20

Applicant: NOKIA CORP

Inventor： BOUAZIZI IMED ,  WANG YE-KUI ,  HANNUKSELA MISKA

IPC: H04N7/26 ,  H04N7/24

Abstract: A system and method for signaling and indicating track relationship infor mation in media files. The present invention provides a mechanism for signal ing the information of layered track groups and the information of MDC track groups, as well as a mechanism for signaling track relationship information in an efficient way. In local playback or unicast streaming applications, t o select an independently decodable track for a certain media type, the info rmation of alternate track groups is first found via the track relation box, and one track is selected from an alternate track group for the media type. If stream switching is desired, the switching track group information is fo und via the track relation box. In multicast applications with scalable or M DC streams, the tracks in a layered or MDC group are found via the track rel ation box and selected among all the layered or MDC groups.

公开(公告)号：AT359673T

公开(公告)日：2007-05-15

申请号：AT03810480

申请日：2003-11-06

Applicant: NOKIA CORP

Inventor： TIAN DONG ,  WANG YE-KUI ,  HANNUKSELA MISKA

IPC: H04N7/12 ,  H04N7/24 ,  H04N7/26 ,  H04N7/36 ,  H04N19/89

Abstract: The invention relates to an encoder for forming an encoded picture stream. The pictures are defined as reference pictures or non-reference pictures, and information relating to decoding order and output order of a picture is defined for pictures of the picture stream. The encoder is arranged to form to the bitstream an indication of such a number of pictures arranged to be buffered in decoding order that is sufficient to recover the output order of pictures. The invention also relates to a signal, hypothetical encoder, decoder, hypothetical decoder, electronic device, system, software program and a storage medium.

公开(公告)号：HK1088162A1

公开(公告)日：2006-10-27

申请号：HK06108434

申请日：2006-07-28

Applicant: NOKIA CORP

Inventor： HANNUKSELA MISKA

IPC: H04N7/12 ,  H04N7/24 ,  H04N7/26 ,  H04N7/50

公开(公告)号：HK1088159A1

公开(公告)日：2006-10-27

申请号：HK06108309

申请日：2006-07-26

Applicant: NOKIA CORP

Inventor： HANNUKSELA MISKA

IPC: H04N7/24 ,  H04N7/26 ,  H04N19/89

Abstract: The invention relates to a method for buffering multimedia information, wherein a parameter is defined indicative of the maximum amount of transmission units comprising multimedia data that precede any transmission unit comprising multimedia data in the packet stream in transmission unit transmission order and follow the transmission unit comprising multimedia data in decoding order. The invention also relates to a system, a transmitting device, a receiving device, a computer program product, a signal and a module.

公开(公告)号：AU2006233316A1

公开(公告)日：2006-10-19

申请号：AU2006233316

申请日：2006-04-12

Applicant: NOKIA CORP

Inventor： WANG YE-KUI ,  HANNUKSELA MISKA

IPC: H04N7/26

Abstract: A method of encoding scalable video data having multiple layers where each layer in the multiple layers is associated with at least one other layer includes identifying one or more layers using a first identifier where the first identifier indicates decoding dependency, and identifying reference pictures within the identified one or more layers using a second identifier. The coding of the second identifier for pictures in a first layer is independent of pictures in a second enhancement layer. As such, for all pictures with a certain value of DependencyID, the syntax element frame_num is coded independently of other pictures with different values of DependencyID. Within all pictures with a pre-determined value of DependencyID, a default frame_num coding method is used.