VIDEO CODING AND DECODING DEVICES AND METHODS PRESERVING PPG RELEVANT INFORMATION
First Claim
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1. Video encoding device for encoding video data comprising:
- i) a first encoder for encoding input video data according to a first encoding scheme and outputting first coded video data having a lower quality than the input video data,ii) a second encoder for encoding input video data according to a second encoding scheme preserving PPG-relevant information and outputting second coded video data, said second encoding unit comprising;
a decoding unit for decoding said first coded video data, in particular according to a decoding scheme complementary to said first encoding scheme, and outputting intermediate video data,a subtraction unit for forming difference video data by determining the difference between said intermediate video data and said input video data,a selection unit for selecting a region of interest in said difference video data providing the strongest PPG signal, andan encoding unit for encoding said selected region of interest of said difference video data and outputting it as said second coded video data.
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Abstract
The present invention relates to a video encoding device (10) for encoding video data and a corresponding video decoding device, wherein during decoding PPG relevant information shall be preserved. For this purpose the video coding device (10) comprises a first encoder (20) for encoding input video data (100) according to a first encoding scheme and outputting first coded video data (120) having a lower quality than the input video data, and a second encoder (30) for encoding input video data (100) according to a second encoding scheme preserving PPG-relevant information and outputting second coded video data (130).
30 Citations
15 Claims
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1. Video encoding device for encoding video data comprising:
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i) a first encoder for encoding input video data according to a first encoding scheme and outputting first coded video data having a lower quality than the input video data, ii) a second encoder for encoding input video data according to a second encoding scheme preserving PPG-relevant information and outputting second coded video data, said second encoding unit comprising; a decoding unit for decoding said first coded video data, in particular according to a decoding scheme complementary to said first encoding scheme, and outputting intermediate video data, a subtraction unit for forming difference video data by determining the difference between said intermediate video data and said input video data, a selection unit for selecting a region of interest in said difference video data providing the strongest PPG signal, and an encoding unit for encoding said selected region of interest of said difference video data and outputting it as said second coded video data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 14)
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9. Video encoding method for encoding video data comprising the steps of:
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encoding input video data (100) according to a first encoding scheme and outputting first coded video data having a lower quality than the input video data, decoding said first coded video data, in particular according to a decoding scheme complementary to said first encoding scheme, and outputting intermediate video data, forming difference video data by determining the difference between said intermediate video data and said input video data, selecting a region of interest in said difference video data providing the strongest PPG signal, and encoding said selected region of interest of said difference video data and outputting it as second coded video data preserving PPG-relevant information. - View Dependent Claims (15)
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10. Video decoding device for decoding encoded video data, said encoded video data comprising first coded video data encoded according to a first encoding scheme and having a lower quality than input video data and comprising second coded video data encoded according to a second encoding scheme preserving PPG-relevant information, said video decoding device comprising:
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i) a first decoder for decoding said first coded video data according to a first decoding scheme and outputting first decoded video data, ii) a second decoder for decoding said second coded video data according to a second encoding scheme and outputting a PPG signal, said second decoding unit comprising; a decoding unit for decoding said second coded video data, in particular according to a decoding scheme complementary to an encoding scheme used in the second encoding scheme used for encoding said input video data, for retrieving an ROI information about the location of a selected region of interest in the first coded video data, and outputting second decoded video data and said ROI information, an addition unit for forming a summation video data by adding said second decoded video data to said first decoded video data, a selection unit for selecting a region of interest in said summation video data by use of said ROI information, said region of interest providing the strongest PPG signal, and a PPG extraction unit for extracting of said PPG signal from said selected region of interest in said summation video data. - View Dependent Claims (11, 12)
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13. Video decoding method for decoding encoded video data, said encoded video data comprising first coded video data encoded according to a first encoding scheme and having a lower quality than input video data and comprising second coded video data encoded according to a second encoding scheme preserving PPG-relevant information, said video decoding method comprising the steps of:
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decoding said first coded video data according to a first decoding scheme and outputting first decoded video data, decoding said second coded video data, in particular according to a decoding scheme complementary to an encoding scheme used in the second encoding scheme used for encoding said input video data, for retrieving an ROI information about the location of a selected region of interest in the first coded video data, and outputting second decoded video data and said ROI information, forming a summation video data by adding said second decoded video data to said first decoded video data, selecting a region of interest in said summation video data by use of said ROI information, said region of interest providing the strongest PPG signal, and extracting of said PPG signal from said selected region of interest in said summation video data.
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Specification