Digital chip and method of operation thereof

摘要

A digital chip system, digital chip, methods for embedding data and methods for extracting data are provided. In some embodiments, a digital chip includes: a watermark encoder digital chip configured to receive one or more watermark bits and generate a stego-video; and a watermark decoder digital chip configured to receive the stego-video and extract the one or more watermark bits from the stego-video. In some embodiments, the digital chip also includes: a video decoder controller digital chip configured to receive raw video data, wherein the raw video data is received from a video decoder; a configuration controller digital chip configured to configure the video decoder; a memory management unit digital chip configured to store at least one of the raw video frame, the raw video data or the stego-video; and an Ethernet controller unit digital chip configured to store or access the raw video or stego-video.

主权项

1. A digital chip, comprising:
a watermark encoder configured to:
receive one or more watermark bits and a raw video frame; andgenerate a stego-video, wherein generation of the stego-video comprises:
calculation of a gray value difference of a pixel relative to a gray value of an input pixel in the raw video frame;determination of a number of bits that are capable of being embedded in the input pixel,
wherein, in response to the gray value difference being determined to be within a first set of values, the number of bits is a first value determined based on a logarithmic function of the gray value difference,wherein, in response to the gray value difference being determined to be within a second set of values, the number of bits is a second value,wherein the second set of values comprises a first range from a first gray value difference metric to a negative version of the gray value difference metric,wherein the first set of values comprises a plurality of ranges,wherein a second range of the plurality of ranges comprises first values greater than the gray value difference metric,wherein the third range of the plurality of ranges comprises second values less than the negative version of the gray value difference metric, andwherein the second value is a constant and the first set of values is exclusive of the second set of values;conversion of the number of bits to a third value; andgeneration of the stego-video based, at least, on calculation of a new gray value of the input pixel with which to encode the input pixel, wherein the new gray value is a function of at least one of the third value, the number of bits or the gray value difference; and a watermark decoder configured to receive the stego-video and extract the one or more watermark bits from the stego-video.