Picture decoding method

a picture and decoding technology, applied in the field of picture decoding methods, can solve the problems of increasing system complexity, reducing compression efficiency, increasing encoding and transmission overhead, etc., and achieve the effect of improving error resiliency and improving compression efficiency

Inactive Publication Date: 2005-09-15
NOKIA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0095]FIG. 3 presents an example of a prediction structure potentially improving compression efficiency,
[0096]FIG. 4 presents an example of the intra picture postponement method that can be used to improve error resiliency,

Problems solved by technology

If the maximum size were defined and if the size is too small for a certain data unit, the data unit has to be divided into more than one transmission unit, which increases encoding and transmission overhead i.e. decreases the compression efficiency and / or increases system complexity.

Method used

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Embodiment Construction

[0108] The general concept behind de-packetization rules is to reorder transmission units such as NAL units from transmission order to the NAL unit decoding order.

[0109] The receiver includes a receiver buffer (or a predecoder buffer), which is used to reorder packets from transmission order to the NAL unit decoding order. In an example embodiment of the present invention the receiver buffer size is set, in terms of number of bytes, equal to or greater than the value of a deint-buf-size parameter, for example to a value 1.2*the value of deint-buf-size MIME parameter. The receiver may also take buffering for transmission delay jitter into account and either reserve a separate buffer for transmission delay jitter buffering or combine the buffer for transmission delay jitter with the receiver buffer (and hence reserve some additional space for delay jitter buffering in the receiver buffer).

[0110] The receiver stores incoming NAL units in reception order into the receiver buffer as fo...

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Abstract

The invention relates to method for buffering encoded pictures. The method includes an encoding step for forming encoded pictures in an encoder. The method also includes a transmission step for transmitting said encoded pictures to a decoder as transmission units, a buffering step for buffering transmission units transmitted to the decoder in a buffer, and a decoding step for decoding the encoded pictures for forming decoded pictures. The buffer size is defined so that the total size of at least two transmission units is defined and the maximum buffer size is defined on the basis of the total size.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application claims priority under 35 USC §119 to U.S. Provisional Patent Application No. 60 / 544,598 filed on Feb. 13, 2004.FIELD OF THE INVENTION [0002] The present invention relates to a method for buffering encoded pictures, the method including an encoding step for forming encoded pictures in an encoder, a transmission step for transmitting said encoded pictures to a decoder, a decoding step for decoding the encoded pictures for forming decoded pictures, and rearranging step for arranging the decoded pictures in decoding order. The invention also relates to a system, transmitting device, receiving device, an encoder, a decoder, an electronic device, a software program, and a storage medium. BACKGROUND OF THE INVENTION [0003] Published video coding standards include ITU-T H.261, ITU-T H.263, ISO / IEC MPEG-1, ISO / IEC MPEG-2, and ISO / IEC MPEG-4 Part 2. These standards are herein referred to as conventional video coding standards. V...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04N7/12H04N7/24H04N7/32
CPCH04N21/44004H04N21/23406H04N19/15
Inventor HANNUKSELA, MISKAAKSU, EMRE
Owner NOKIA CORP
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