Unlock instant, AI-driven research and patent intelligence for your innovation.

Dynamic image decoding device

A technology of a moving image and decoding device, which is applied in the directions of image communication, TV, color TV components, etc., can solve problems such as difficulty in retrieval, difficulty in rewinding playback and display, etc.

Inactive Publication Date: 2005-02-02
PANASONIC CORP
View PDF1 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when only the reference frame is displayed, it is difficult to obtain a smooth rewind playback display because the difference frame between the reference frames needs to be skipped for display.
[0006] In addition, when the interval between reference frames becomes longer and there are many difference frames between reference frames, it is difficult to find the desired frame because the number of difference frames to be skipped during display rewind playback increases.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Dynamic image decoding device
  • Dynamic image decoding device
  • Dynamic image decoding device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0068] FIG. 1 is a block diagram showing the overall configuration of a video playback system according to the first embodiment. This system performs playback processing (normal playback, special playback) on encoded video data included in the multiplexed data 100 . This system includes a video data decoding device 1 and a display device 2 . The video data decoding device 1 includes input / output interfaces 11 , 15 , a CPU 12 , an accumulation memory 13 , and a frame buffer 14 .

[0069] The input / output interface 11 performs input processing of the multiplexed data 100 input from the outside.

[0070] The CPU 12 performs analysis of multiplexed data, acquisition of frame information, decoding of coded video data, and overall control based on the forward and reverse playback speed information 200 . The forward and reverse playback speed information 200 indicates the playback direction and playback speed specified by the user.

[0071] The storage memory 13 stores multiplexed...

no. 2 Embodiment approach

[0143] The overall configuration diagram of the video playback system of the second embodiment is the same as that of FIG. 1 , but the operation of the CPU 12 is different.

[0144] Normal playback processing in the video playback system according to the second embodiment will be described with reference to FIGS. 13 and 14 .

[0145] (regular playback processing)

[0146] (step ST1 to step ST5)

[0147] As in the first embodiment, the processing from step ST1 to step ST5 during normal playback is to store decoded video data (frame data) in the frame buffer 14 .

[0148] (Step ST3, Step ST11 to Step ST15)

[0149] In the first embodiment, step ST3 for performing rewind playback and the processing from step ST11 to step ST15 are to select the difference frame Px.

[0150] (step ST21)

[0151] Among the frames stored in the frame buffer 14 , the CPU 12 outputs and stores the difference frame Px selected in step ST15 in the frame buffer memory 14 . In the first embodiment, in...

no. 3 Embodiment approach

[0166] The overall configuration diagram of the moving image playback system of the third embodiment is the same as that of FIG. 1 , but the operation of the CPU 12 is different. In addition, in the third embodiment, in the rewind playback process of the second embodiment, another new differential frame is decoded based on the differential frame stored in the frame buffer 14 .

[0167] Normal playback processing in the video playback system according to the third embodiment will be described with reference to FIGS. 13 and 18 .

[0168] (regular playback processing)

[0169] Similar to the processing of the second embodiment, the difference frame Px is stored in the frame buffer 14 in step ST2.

[0170] Rewind playback processing in the video playback system according to the third embodiment will be described with reference to FIGS. 17 and 18 .

[0171] (rewind playback processing)

[0172] (step ST1, step ST2)

[0173] The processing performed in step ST1 and step ST2 is the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

To perform a smooth rewinding and reproduction in a moving picture decoding apparatus. Multiplexed data 100 are stored into a storage memory 13 via an input / output interface 11 (step ST1), and encoded moving image data are demultiplexed and stored into the storage memory (step ST2). A magnification power Dusr corresponding to a reproducing speed in rewinding and reproduction and a magnification power Dmax corresponding to a maximum decoding speed relative to a decoding speed in ordinary reproduction of the moving image decoding apparatus are acquired from the number N of differential frames and forward / backward reproducing speed information 200 (steps ST11-ST13), a range (m) of decodable differential frames is found (step ST14), and at least one of the differential frames is selected (step ST15). A reference frame and the selected differential frame are decoded from the stored encoded moving picture data and outputted onto a display device.

Description

technical field [0001] The invention relates to a device for decoding encoded dynamic image data, in particular to controlling the playback of the encoded dynamic image data. Background technique [0002] Nowadays, with the development of information technology, it is possible to enjoy playback of audio and moving images (videos) compressed and stored in storage media according to MPEG standards or the like. The MPEG standard refers to an encoding standard for encoding moving image data into reference frames and differential frames. A video data decoding device that decodes and displays coded video data with such a data structure follows user instructions and supports special playback such as fast forward or rewind, which is an important function for easy and fast retrieval of content. When moving images are compressed using the MPEG standard, a moving image decoding device having a bit rate higher than the average bit rate of the corresponding moving image data is required...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/76H04N5/783H04N5/92H04N9/804H04N19/423H04N19/44H04N19/50H04N19/503H04N19/593
CPCH04N5/783H04N9/8042
Inventor 西村宪吾八木顺子松本道弘诸桥隆治
Owner PANASONIC CORP