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Image coder and method, image decoder and method

An image encoding and encoding technology, which is applied in the field of image encoders and can solve problems such as random access difficulties

Inactive Publication Date: 2005-01-19
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the case where the MPEG 4 standard is used for storage media, efficient random access will be difficult

Method used

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  • Image coder and method, image decoder and method
  • Image coder and method, image decoder and method
  • Image coder and method, image decoder and method

Examples

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Embodiment Construction

[0082] Embodiments of the present invention will be described in detail later with reference to the accompanying drawings. Prior to this, in order to make the correspondence between each device of the present invention and the following embodiments clearer in the claims, each device will be appended by appending a corresponding Examples are not specified. The corresponding example is merely an example.

[0083] An image encoder for encoding an image and outputting a resulting encoded bit stream, the image encoder comprising: receiving means (i.e., frame memory 31 shown in FIG. 11 or 12, etc.) for receiving the image and encoding means (ie, the VLC unit 36 ​​shown in FIGS. 11 and 12 etc.) for dividing one or more layers of each object constituting the image into a plurality of groups and encoding the plurality of groups.

[0084] A kind of image encoder, when assuming that the object coded by intra-correlation coding is an intra-correlation video object plane (I-VOP), the obj...

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Abstract

Efficient random access is made possible. A group of video plane (GOV) layers in which encoding start absolute time is arranged to be within an accuracy of a second is provided as the layer of a coded bit stream. The GOV layer can be inserted not only at the head of the coded bit stream but at an arbitrary position in the coded bit stream. The display time of each video object plane (VOP) constituting the GOV layer is represented by modulo_time_base which represents absolute time in the unit of a second with the encoding start absolute time as standard and VOP_time_increment which represents in the unit of a millisecond the time that has elapsed since time (synchronization point) indicated by the modulo_time_base.

Description

[0001] This application is a divisional application of Chinese patent application No.98800376.7 with a filing date of March 31, 1998 and an invention title of "Image Encoder and Its Method, Image Decoder and Its Method, and Distribution Media". technical field [0002] The present invention relates to an image encoder, an image encoding method, an image decoder, an image decoding method, and a distribution medium. More specifically, the present invention relates to an image encoder, image encoding method, image decoder, image decoding method, and distribution medium, in which case moving image data is recorded in a storage medium such as a magneto-optical disc, magnetic tape, etc., and the recorded data is reproduced and displayed in a display, or in this case moving image data is passed through A transmission channel is transmitted from a transmitter side to a receiver side, and received moving image data is displayed or edited and recorded at the receiver side. Background ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/91G06T9/00G11B20/12G11B27/10H03M7/30H03M7/40H04N5/92H04N5/93H04N7/24H04N19/20H04N19/31H04N19/33H04N19/423H04N19/50H04N19/503H04N19/51H04N19/593H04N19/60H04N19/61H04N19/625H04N19/70H04N19/91
CPCH04N19/00436H04N19/00781H04N19/00884H04N19/00418H04N7/26946H04N19/00H04N7/26691H04N7/26696H04N19/0043H04N19/70H04N19/61H04N19/29H04N19/33H04N19/31H04N19/177H04N5/93
Inventor 矢崎阳一铃木辉彦
Owner SONY CORP
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