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Digital decoding method

A decoding method and digital technology, applied in the field of digital decoding, can solve problems such as image quality changes and lens restrictions

Inactive Publication Date: 2004-12-15
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, there is a problem that the lenses to be combined are limited, and the image quality varies among the lenses.

Method used

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Embodiment Construction

[0015] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

[0016] figure 1 It is a block diagram of the first video recording and playback device adopting the digital decoding method involved in the present invention. figure 1 Among them, 11 is an encoding unit (encoder), 12 is a data storage medium, 13 is a data readout control unit, 14 is a data input control unit, 15 is a bit stream storage unit (buffer), and 16 is a data output control unit, 17 is a decoding unit (decoder), 18 is a transmission rate control unit, and BS1 to BS6 are coded bit streams.

[0017] figure 1 The apparatus comprises an encoder 11 and a decoder 17, a so-called codec. The encoder 11 can compress and encode the original video signal to generate a bit stream BS1. The generated bit stream BS1 is recorded in the data storage medium 12 . The data storage medium 12 is a recording medium such as a magneto-optical disk, a magnetic tape, or a sem...

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Abstract

Every time scenes should be joined, a read rate for a data storage medium is controlled by reference to a buffer occupancy level such that data is stored in the buffer to a predetermined level or more when the first frame of each scene starts being decoded. In this manner, seamless presentation of multiple scenes is realizable by using only a decoder section without resorting to an encoder section.

Description

technical field [0001] The present invention relates to a digital decoding method, wherein the encoded bit stream of each shot is decoded sequentially, so that the moving images of multiple shots can be reproduced without interruption. Background technique [0002] MPEG (Moving Picture Experts Group: Moving Picture Experts Group) is a representative one in animation compression coding technology. In Japanese Patent Laid-Open Publication: Japanese Patent Application Laid-Open No. Hei 9-331524, there is disclosed a digital encoding method in which a plurality of bit streams (multiple shots) respectively encoded according to the MPEG standard can be seamlessly combined. In this method, the respective encoding bit rates (compression rates) of the tail of the first bitstream and the head of the second bitstream are limited to combine the second shot after the first shot without interruption to avoid Overflow and underflow occur in the decoding buffer. [0003] The prior art des...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/24
CPCH04N21/44004H04N21/23406H04N21/44016H04N21/23424H04N21/234
Inventor 谷山昌之宫越英司渡部彰启
Owner PANASONIC CORP