公开(公告)号：US10887365B2

公开(公告)日：2021-01-05

申请号：US16262048

申请日：2019-01-30

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Wenjun Zhao ,  Yannan Wu

IPC: H04L29/06 ,  H04N19/15 ,  H04N19/174 ,  H04N19/126

Abstract: A computer-implemented method for controlling bit rate includes determining a difference between a cumulative number of bits used to encode one or more slices of a frame up to and including a first slice encoded using a first coding parameter and a maximum number of bits allowed to encode the one or more slices of the frame, updating a coding parameter threshold based at least in part on a counter that indicates a number of times when one or more coding parameters used to encode the one or more slices reach or exceed the coding parameter threshold, and determining a second coding parameter used to encode a second slice of the frame based at least in part on the difference and the updated coding parameter threshold.

公开(公告)号：US11082707B2

公开(公告)日：2021-08-03

申请号：US17029973

申请日：2020-09-23

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Wenjun Zhao ,  Jianhua Zhang ,  Guopeng Zhang ,  Chengzhang Yang ,  Hui Sun

IPC: H04N19/176 ,  H04N19/14 ,  H04N19/124

Abstract: An encoding method includes obtaining an image frame to be encoded. The image frame includes one or more image blocks. The method further includes determining one or more complexities of the one or more image blocks. Each of the one or more complexities corresponds to one of the one or more image blocks. The method also includes encoding the one or more image blocks based on the one or more complexities.

公开(公告)号：US10917652B2

公开(公告)日：2021-02-09

申请号：US16381927

申请日：2019-04-11

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Wenjun Zhao ,  Wei Chen ,  Xiaozhen Zheng

IPC: H04N19/196 ,  H04N19/176 ,  H04N19/174 ,  H04N19/15 ,  H04N19/115 ,  H04N19/124

Abstract: A data rate control method includes determining an adjustment value of a first encoding parameter for encoding a first strip based on a quota of the first strip included in a frame that has not been encoded and based on a quota of at least one already encoded strip included in the frame. At least one of the quota of the first strip and the quota of the at least one already encoded strip relates to a number of shares of bits used for encoding a strip. The data rate control method also includes determining the first encoding parameter based on the adjustment value.

公开(公告)号：US10958923B2

公开(公告)日：2021-03-23

申请号：US16261331

申请日：2019-01-29

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Jianhua Zhang ,  Hao Wang ,  Yue Dong ,  Bin Han ,  Wenjun Zhao

IPC: H04N19/436 ,  H04N19/15 ,  H04N19/70 ,  H04N19/124 ,  H04N19/127 ,  H04N19/146 ,  H04N19/174 ,  H04N19/423 ,  H04N19/625

Abstract: An electronic device includes a slice splitter and a slice encoder. The slide splitter is configured to split video data into a plurality of slices. Each slice contains a plurality of data blocks and each data block contains a plurality of data points. The slice encoder includes one or more video encoding circuits and is configured to encode the data blocks in a plurality of data streams concurrently to obtain encoded data streams and combine the encoded data streams into a combined data stream.

公开(公告)号：US20210168376A1

公开(公告)日：2021-06-03

申请号：US17171274

申请日：2021-02-09

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Lei ZHU ,  Wenjun Zhao ,  Wenyi Su ,  Liang Zhao

IPC: H04N19/167 ,  H04N19/176 ,  H04N19/124 ,  B64C39/02

Abstract: An unmanned aerial vehicle comprises a body coupled with a plurality of propulsion systems and an imaging device; an encoder that encodes video data generated by the imaging device, and a wireless communication system for transmitting the encoded video data. The encoder includes a region of interest (ROI) control module that determines, within an image frame of the video data, a first region and a second region, the ROI control module further setting a first limit indicating a maximum value of quantization parameters for encoding each macroblock within the first region, a second limit indicating a maximum size of the first region, and a third limit indicating a minimum size of the second region. The encoder further includes a ROI monitoring module coupled to the ROI control module that estimates a first image quality of the first region and a second image quality of a second region, and the ROI control module adjusts a size of the first region and the second region according to the first image quality and the second image quality. The present application also relates to an encoding method as embodied in the encoder.

公开(公告)号：US20210006807A1

公开(公告)日：2021-01-07

申请号：US17023380

申请日：2020-09-17

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Jianhua Zhang ,  Bin Han ,  Wenjun Zhao ,  Ming Cui

IPC: H04N19/423 ,  H04N19/60 ,  H04N19/129 ,  H04N19/93 ,  H04N19/124 ,  H04N19/91 ,  H04N19/13 ,  H04N19/174

Abstract: Encoding apparatuses are provided. The encoding apparatus includes: a first buffer configured to buffer a quantized coefficient of an image block that is input by a quantization circuit; an information generation circuit configured to detect the quantized coefficient of the image block sequentially to obtain run-length encoding information; a second buffer configured to buffer the run-length encoding information generated by the information generation circuit; and a processing circuit configured to: when the second buffer stores run-length encoding information, read the run-length encoding information from the second buffer, read the quantized coefficient corresponding to the run-length encoding information from the first buffer, and output the run-length encoding information and the corresponding quantized coefficient to an entropy encoding circuit.