Deep-space ground penetrating radar data compression method based on inter-frame prediction
An inter-frame prediction and ground penetrating radar technology, applied in the direction of digital video signal modification, electrical components, image communication, etc., can solve problems such as increasing compression loss, unable to fully reduce data dynamic range, and unable to minimize quantization error. , to achieve the effect of reducing quantization error and distortion
Inactive Publication Date: 2018-03-02
INST OF ELECTRONICS CHINESE ACAD OF SCI
View PDF4 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0008] (3) The dynamic range of the data cannot be sufficiently reduced, so that the quantization error cannot be minimized and the compression loss is increased
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0030] The present invention provides a deep-space ground-penetrating radar data compression method based on inter-frame prediction, figure 1 It is a flow chart of the deep-space ground-penetrating radar data compression method based on inter-frame prediction in an embodiment of the present invention, such as figure 1 shown, including the following steps:
[0031] Step S1: Obtain the optimal reference frame data of the current frame data by using the inter-frame predictor.
[0032] Step S1 further comprises sub-steps:
[0033] Sub-step S11: Calculating the inter-frame predictors of the first K reference frame data of the current frame data;
[0034] The current frame data to be compressed is the Nth frame data x n , r...
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
For the problem that a deep-space ground penetrating radar is large in data size and limited in data downlink transmission capacity, the invention discloses a deep-space ground penetrating radar datacompression method based on inter-frame prediction. The method comprises the following steps: (1) performing inter-frame prediction on former-k frame data of the current processing frame data according to a designed inter-frame prediction index, predicting the optimal reference frame data most similar to the current frame data in the K-frame reference frame data; (2) taking the acquired optimal reference frame data and the current frame data as the difference to acquire the difference data; (3) quantizing the difference data by using a Lloyd-Max quantizer; and (4) reconstructing the original data by using the quantized difference data and the reference frame data. Compared with other compression algorithm, the difference data in small dynamic range is quantized, thereby avoiding an operation of directly quantizing the original data in large dynamic range, the problem that the blocking size is hard to select in a BAQ algorithm is solved, and the quantization error and distortion are greatly reduced.
Description
technical field [0001] The invention relates to the field of ground-penetrating radar data compression, in particular to a deep-space ground-penetrating radar data compression method based on inter-frame prediction. Background technique [0002] In deep space exploration missions, radar payloads are carried on orbiters or patrols as important payloads to obtain information such as subsurface geological structures and layers of detected stars. With the development of radar technology in the direction of ultra-high resolution, the bandwidth of radar is getting larger and larger, which leads to a sharp increase in the amount of radar data. However, the downlink transmission capacity of deep space data is limited, and the limitation of downlink data transmission capacity has become an important bottleneck affecting scientific data acquisition. Therefore, it is urgent to design a reasonable compression algorithm according to the characteristics of deep space subsurface detection ...
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
Login to View More IPC IPC(8): H04N19/573H04N19/42
Inventor 刘小军李朋花小磊沈绍祥方广有
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI