# US 2019/0320201 A1 · Moving image encoding device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2019/0320201 A1
- Document ID: US20190320201A1
- Status: Published application
- Kind: A1
- Application number: 16/452,025
- Filed: 2019-06-25
- Published: 2019-10-17
- Earliest claimed: 2015-03-25
- Assignees: NTT Electronics Corporation; Nippon Telegraph and Telephone Corporation
- Applicants: NTT Electronics Corporation; Nippon Telegraph and Telephone Corporation
- Inventors: Akiko SHIMAZAKI; Ken NAKAMURA; Takayuki ONISHI; Takashi SANO
- Web page: https://patentgrep.com/patent/US20190320201A1

## CPC

- H04N 19/593: involving spatial prediction techniques
- H04N 19/107: between spatial and temporal predictive coding, e.g. picture refresh
- H04N 19/11: among a plurality of spatial predictive coding modes
- H04N 19/126: Details of normalisation or weighting functions, e.g. normalisation matrices or variable uniform quantisers
- H04N 19/14: Coding unit complexity, e.g. amount of activity or edge presence estimation (H04N19/146 takes precedence)
- H04N 19/159: Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
- H04N 19/176: the region being a block, e.g. a macroblock
- H04N 19/182: the unit being a pixel
- H04N 19/61: in combination with predictive coding
- H04N 19/625: using discrete cosine transform [DCT]
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

A computation unit subtracts a prediction image from an input image. An orthogonal transformation unit applies orthogonal transformation to an output of the computation unit. A quantization unit quantizes an output of the orthogonal transformation unit. An encoding unit encodes an output of the quantization unit. A prediction mode determination unit determines a prediction mode from the input image. The prediction mode is different according to types of an I-picture, a P-picture and a B-picture.

## Claims

### Claim at position 1

1-5. (canceled)

### Claim 6

A moving image encoding device generating a predictive image by using intra-prediction and encoding a difference between an input image and the predictive image for each block, comprising:
a flat area determination parameter calculator evaluating a flatness of each block of the input image to calculate a flat are determination parameter;
an intra-prediction mode offset value calculator calculating an intra-prediction mode offset value from the flat are determination parameter of an adjacent block used in the intra-prediction for each intra-prediction mode;
an evaluation value calculator calculating an evaluation value from the difference between the input image and the predictive image for each intra-prediction mode; and a prediction mode determination unit determining an optimal intra-prediction mode based on a sum of the evaluation value and the intra-prediction mode offset value.

### Claim 7 (depends on 6)

The moving image encoding device according to claim 6, further comprising an application area limiting unit substituting zero into the intra-prediction mode offset value used in the prediction mode determination unit when the flat are determination parameter of a coding target block is equal to or larger than a threshold.

### Claim 8

A moving image encoding device generating a predictive image by using intra-prediction or inter-prediction and encoding a difference between an input image and the predictive image for each block, comprising:
a flat area determination parameter calculator evaluating a flatness of each block of the input image to calculate a flat area determination parameter;
an evaluation value calculator calculating an inter evaluation value and an intra evaluation value from the difference between the input image and the predictive image;
an intra-offset value setting unit setting a larger intra-offset value as the flat area determination parameter of an adjacent block used in the intra-prediction is larger; and
a prediction mode determination unit determining a prediction mode based on a magnitude of the inter evaluation value and a sum of the intra evaluation value and the intra offset value.

### Claim 9 (depends on 8)

The moving image encoding device according to claim 8, further comprising an application area limiting unit substituting zero into the intra offset value used in the prediction mode determination unit when the flat area determination parameter of a coding target block is equal to or larger than a threshold.