Method and encoder system for encoding video

An encoder system for encoding video comprising:

• a receiving module arranged to receive information representative of pixels in a current digital image frame of a video to be encoded;
• a group value module arranged to calculate a group value for each group of neighboring pixels based on said received information for groups of neighboring pixels in said current digital image frame;
• an accumulation module arranged to accumulate group values of corresponding groups of neighboring pixels in a first sequence of digital image frames comprising said current image frame and a first number of preceding image frames to form a first accumulation of accumulated group values, and arranged to accumulate group values of corresponding groups of neighboring pixels in a second sequence of digital image frames comprising said current image frame and a second number of preceding image frames to form a second accumulation of accumulated group values, said second sequence of digital image frames includes digital image frames captured over a longer period of time than the image frames of said first sequence;
• a comparing module arranged to compare accumulated group values of said first accumulation with accumulated group values of corresponding groups of neighboring pixels of said second accumulation;
• a global change value module arranged to calculate a global change value based on the comparison of the first and second accumulations of group values;
• a GOP length module arranged to set a GOP length as a number of frames to be encoded in a group of pictures based on said global change value, including making a choice between increasing, decreasing, and leaving unaltered a current GOP length;
• and
• an encoding module arranged to encode said current image frame as an intra-frame or an inter-frame based on said GOP length.

A camera comprising an encoder system, the encoder system comprising:

• a receiving module arranged to receive information representative of pixels in a current digital image frame of a video to be encoded;
• a group value module arranged to calculate a group value for each group of neighboring pixels based on said received information for groups of neighboring pixels in said current digital image frame;
• an accumulation module arranged to accumulate group values of corresponding groups of neighboring pixels in a first sequence of digital image frames comprising said current image frame and a first number of preceding image frames to form a first accumulation of accumulated group values, and arranged to accumulate group values of corresponding groups of neighboring pixels in a second sequence of digital image frames comprising said current image frame and a second number of preceding image frames to form a second accumulation of accumulated group values, said second sequence of digital image frames includes digital image frames captured over a longer period of time than the image frames of said first sequence;
• a comparing module arranged to compare accumulated group values of said first accumulation with accumulated group values of corresponding groups of neighboring pixels of said second accumulation;
• a global change value module arranged to calculate a global change value based on the comparison of the first and second accumulations of group values;
• a GOP length module arranged to set a GOP length as a number of frames to be encoded in a group of pictures based on said global change value, including making a choice between increasing, decreasing, and leaving unaltered a current GOP length;
• and
• an encoding module arranged to encode said current image frame as an intra-frame or an inter-frame based on said GOP length.

An article of manufacture including a computer-readable non-transitory storage medium having instructions stored thereon, execution of which by a computing device causes the computing device to perform operations comprising:

• receiving information representative of pixels in a current digital image frame of a video to be encoded;
• calculating a group value for each group of neighboring pixels based on said received information for groups of neighboring pixels in said current digital image frame;
• accumulating group values of corresponding groups of neighboring pixels in a first sequence of digital image frames comprising said current frame and a first number of preceding image frames to form a first accumulation of accumulated group values;
• accumulating group values of corresponding groups of neighboring pixels in a second sequence of digital image frames comprising said current digital image frame and a second number of preceding digital image frames to form a second accumulation of accumulated group values, wherein said second sequence of digital image frames includes digital image frames captured over a longer period of time than the image frames of said first sequence;
• comparing accumulated group values of said first accumulation with accumulated group values of corresponding groups of neighboring pixels in said second accumulations;
• calculating a global change value based on the comparison of the first and second accumulations of group values;
• setting a GOP length as a number of frames to be encoded in a group of pictures based on said global change value, including making a choice between increasing, decreasing, and leaving unaltered a current GOP length;
• and
• encoding said current image frame as an intra-frame or inter-frame based on said GOP length.