Unlock instant, AI-driven research and patent intelligence for your innovation.
Moving image encoder and moving image decoder, and its method and program
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
一种移动图像、编码装置的技术，应用在计算机程序领域，能够解决图像质量差等问题
Inactive Publication Date: 2007-05-23
NEC CORP
View PDF0 Cites 7 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0026] In conventional three-dimensional microwave coding, there is a problem that the image quality of the downscaled image obtained by applying spatial scalability is inferior to the image quality when the input pre-reduced image is coded.
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0222] Using FIGS. 1 to 9, the steps of the moving image encoding device according to the first embodiment of the present invention, the steps executed cyclically, and the implementation method of the signal encoding process will be described.
[0223] Fig. 1 is a block diagram showing the structure of a moving picture coding apparatus according to Embodiment 1 of the present invention. In FIG. 1, the moving image encoding device is composed of a time-space-frequency division unit 101, a reduced image signal encoding unit 102, a time-space high-frequency signal encoding unit 103, a motion information encoding 104, and a multiplexing unit 105. The flow of processing of the encoding device serving as the embodiment will be described with reference to FIG. 1.
[0224] First, the time-space frequency dividing unit 101 takes the input image signal 1000 as input, and generates a reduced image signal 1001 that reduces each frame constituting the input image signal 1000, and removes high-...
Embodiment 2
[0288] In the first embodiment described above, the reduced image generating unit 110 uses the time low-frequency component and the time high-frequency component to reconstruct a moving image signal corresponding to the time high-frequency component, and then performs a reduction process on the reconstructed result to generate Reduced image signal of moving image. However, it is not limited to this method, and a reduced image signal of a moving image can be generated. Therefore, in the second embodiment, the structure of the reduced image generating unit 110 that is different from the first embodiment will be described. It should be noted that the other structure is the same as that of Embodiment 1, so detailed description is omitted.
[0289] FIG. 7 is a block diagram showing the structure of the second reduced image generating unit 110 of the second embodiment. The processing flow of the reduced image generating unit 110 shown in FIG. 7 will be described.
[0290] The low-freque...
Embodiment 3
[0301] Example 3 of the present invention will be described.
[0302] In Embodiment 1 and Embodiment 2 described above, depending on the image, the encoding distortion based on the weight at the time of generating the reduced image signal may increase. Specific examples are listed below.
[0303] The present invention is characterized in that, as shown in FIG. 26, from the reduced image signal 15 in the reduced resolution, the temporal low-frequency component 16, and the predicted image signal obtained through motion compensation and reduction processing, the temporal high-frequency spatial low-frequency is reconstructed Signal 17.
[0304] The reduced image signal 15 reconstitutes the reduced image signal 14 in which the moving image signal 21 shown in FIG. 25 is reduced, and the temporal low-frequency component 16 reconstitutes the temporal low-frequency component 11 in FIG. 25. When decoding, distortion caused by quantization may sometimes occur in these signals.
[0305] Fig. ...
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
Login to View More
Abstract
A moving image signal (10) in a resolution layer in time space division filtering is time-layered to divide it into a time low-band signal (11) and a time high-band signal (12). Using the time low- and high-band signals (11, 12), a moving image signal (21) is generated by re-constituting the former moving image signal corresponding to the time high-band signal (12). A reduced image signal (14) is generated by subjecting the moving image signal (21) to a reduction processing. The time high-band signal (12) is subjected to a high-band generation processing by space-layering to generate a time high-band space high-band signal (13). The time low-band signal (11), the reduced image signal (14), and the time high-band space high-band signal (13) are used as division result. Assuming the time low-band signal (11) as a moving image signal having a time resolution lower by one level and assuming the reduced image signal (14) as a moving image signal having a space resolution lower by one level, time space division filtering is regressively performed to layer a moving image signal to multiple levels.
Description
Technical field [0001] The present invention relates to a moving image coding method, a moving image decoding method, a moving image coding device, a moving image decoding device and a computer program. Background technique [0002] Partial band coding is a method of dividing an image signal in frequency and performing coding processing on signals in each frequency band (partial band signals). Partial band coding is different from block-based orthogonal transforms such as discrete cosine transform. In principle, block deformation does not occur. It has the characteristics of dividing low-frequency components through loops, which can easily realize hierarchical coding. In still images, the international standard coding method JPEG2000 adopts partial band coding using microwave transform. [0003] When applying partial band coding to moving image coding, it is necessary to consider not only the correlation in the spatial direction of the signal, but also the correlation in the time...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More