公开(公告)号：US10536697B2

公开(公告)日：2020-01-14

申请号：US15517357

申请日：2014-12-29

Applicant: Samsung Electronics Co., Ltd.

Inventor： Dai-woong Choi ,  Woong-il Choi ,  Dae-sung Cho

IPC: H04N19/124 ,  H04N19/184 ,  H04N19/625 ,  H04N19/91

Abstract: Provided is a re-encoding method including obtaining a first quantization table from a bitstream including an image encoded using the first quantization table; obtaining a second quantization table based on a pattern representing a size distribution of values of elements of the first quantization table, the second quantization table including elements respectively corresponding to the elements of the first quantization table; and re-encoding a reconstructed image by using the second quantization table, the reconstructed image being obtained by decoding the encoded image by using the first quantization table.

公开(公告)号：US10477211B2

公开(公告)日：2019-11-12

申请号：US15524055

申请日：2015-05-21

Applicant: Samsung Electronics Co., Ltd.

Inventor： Dai-woong Choi ,  Woong-il Choi ,  Dong-woo Kim ,  A-rang Lee ,  Jong-seok Lee

IPC: H04N19/124 ,  H04N19/40 ,  H04N19/172

Abstract: A method of determining whether an image is to be re-encoded includes obtaining a first quantization matrix from an image file including the image, the image being encoded by quantization based on the first quantization matrix including a plurality of first quantization parameters; obtaining a second quantization matrix from a re-encoding device, the second quantization matrix including a plurality of second quantization parameters and having the same size as the first quantization matrix; determining a comparison coefficient based on elements greater than ‘0’ among elements of a comparison matrix obtained by subtracting the first quantization matrix from the second quantization matrix; and determining that the image is to be decoded by inverse quantization based on the first quantization matrix and the decoded image is to be re-encoded by quantization based on the second quantization matrix, when the comparison coefficient is greater than a first threshold value.

公开(公告)号：US09807062B2

公开(公告)日：2017-10-31

申请号：US14038057

申请日：2013-09-26

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Sung-bum Park ,  Yong-je Kim ,  Myung-jin Eom ,  Dae-Sung Cho ,  Woong-il Choi

IPC: H04L29/06 ,  G06F21/60

CPC classification number: H04L63/0428 ,  G06F21/60 ,  G06F2221/2107 ,  H04L63/08 ,  H04L63/105

Abstract: A method and apparatus for enabling a cloud server to provide screen information data indicating a screen to be displayed on a client device are provided. The method of enabling a cloud server to provide screen information data relating to a screen to be displayed on a client device includes: generating the screen information data; determining whether or not to protect the generated screen information data based on characteristics of an object configuring the screen; encrypting the provided screen information data based on the determining; and transmitting the encrypted the screen information data to the client device.