1. A method of color components compression, comprising:
receiving video data encoded by a 4:4:4 sampling format;
down-sampling color components of each set of neighboring pixels in the video data and calculating a first difference of the color components between the video data before and after down-sampling in a down-sampling mode;
truncating the color components of each pixel in the video data and calculating a second difference of the color components between the video data before and after truncation in a truncation mode; and
comparing the first difference and the second difference and selecting one of the down-sampling mode and the truncation mode that has a smaller difference to compress the video data into a 4:2:2 sampling format.
2. The method for method of color components compression according to claim 1, wherein the video data is divided into a plurality of sets of neighboring pixels and each set comprises two pixels.
3. The method for method of color components compression according to claim 1, wherein the step of down-sampling color components of each set of neighboring pixels in the video data comprises:
retaining the color components of one of the two pixels in each set of neighboring pixels and ignoring those of the other pixel.
4. The method for method of color components compression according to claim 1, wherein the step of truncating the color components of each pixel in the video data comprises:
truncating the last 4 bits of the color components of each pixel in the video data.
5. The method for method of color components compression according to claim 4, wherein the step of truncating the color components of each pixel in the video data further comprises:
calculating a decimal value of the last 4 bits of the color component of each pixel;
determining whether the decimal value is larger than 8; and
if the decimal value is larger than 8, carrying the fifth bit of the color component by one.
6. The method for method of color components compression according to claim 1, wherein after the video data is compressed into the 4:2:2 sampling format, the method further comprises:
storing the compressed video data in a memory.
7. The method for method of color components compression according to claim 6, wherein before storing the compressed video data in the memory, the method further comprises:
storing an indicator in the last bit of the luminance of each pixel, in which the indicator records the mode selected for compressing the color components of the pixel.
8. The method for method of color components compression according to claim 6, wherein after storing the compressed video data in the memory, the method further comprises:
decompressing the compressed video data in the memory.
9. The method for method of color components compression according to claim 8, wherein the step of decompressing the compressed video data in the memory comprises:
accessing the indicator of each pixel of the compressed video data from the memory so as to determine the mode selected for compressing the color components of the pixel;
if the compression mode is determined as the down-sampling mode, using weighted sum of the color components of neighboring pixels to be the color components of the pixel therebetween in each set of neighboring pixels;
if the compression mode is determined as the truncation mode, shifting the recorded color components of each pixel by 4 bits and filling in the last 4 bits of the color components by zeros; and
outputting the decompressed video data in the 4:4:4 sampling format.
10. The method for method of color components compression according to claim 9, wherein before outputting the decompressed video data in the 4:4:4 sampling format, the method further comprises:
checking whether the decompressed luminances of the two pixels adjacent to each pixel are the same but different from the decompressed luminance of the pixel therebetween; and
if yes, modifying the color components of the pixel with the color components of the neighboring pixels thereof.
11. The method for method of color components compression according to claim 1, wherein the color components comprise U color components and V color components.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method of forming a macroalgae tissue web comprising the steps of:
a. dispersing a macroalgae dry lap pulp to form a first fiber slurry;
b. dispersing a conventional papermaking pulp to form a second fiber slurry;
c. depositing the first and second fiber slurries onto a forming fabric to form a wet web;
d. dewatering the wet web to a consistency of from about 20 to about 30 percent; and
e. drying the wet web to a consistency of greater than about 90 percent thereby forming a dried macroalgae tissue web.
2. The method of claim 1 wherein the macroalgae dry lap pulp has a moisture content of less than about 10 percent and wherein the macroalgae dry lap pulp comprises from about 1 to about 30 percent, by weight of the dry lap pulp, macroalgae pulp fibers and from about 99 to about 70 percent, by weight of the dry lap pulp, conventional papermaking fibers.
3. The method of claim 1 further comprising the steps of transferring the dewatered web from the forming fabric to a transfer fabric traveling at a speed from about 10 to about 40 percent slower than the forming fabric; and transferring the web to a throughdrying fabric.
4. The method of claim 1 wherein the drying step comprises transferring the dewatered web to the surface of a Yankee dryer and further comprising the step of creping the dried macroalgae tissue web from the surface of the Yankee dryer.
5. The method of claim 3 further comprising the steps of transferring the web to the surface of a Yankee dryer and creping the web from the surface of the Yankee dryer.
6. The method of claim 1 wherein the dried macroalgae tissue web comprises from about 1 to about 20 weight percent macroalgae fibers, the tissue web having a basis weight less than about 60 grams per square meter (gsm) and a sheet bulk greater than about 5 cm3g.
7. A method of forming a macroalgae tissue web comprising the steps of:
a. forming a macroalgae pulp mixing never-dried macroalgae pulp fibers and once dried conventional papermaking pulp fibers;
b. dispersing the macroalgae pulp to form a first fiber slurry;
c. dispersing a conventional papermaking pulp to form a second fiber slurry;
d. depositing the first and second fiber slurries onto a forming fabric to form a wet web;
e. dewatering the wet web to a consistency of from about 20 to about 30 percent; and
f. drying the wet web to a consistency of greater than about 90 percent thereby forming a dried macroalgae tissue web.
8. The method of claim 7 wherein the macroalgae pulp has a moisture content of less than about 10 percent and wherein the macroalgae pulp comprises from about 1 to about 30 percent, by weight of the pulp, macroalgae pulp fibers and from about 99 to about 70 percent, by weight of the dry lap pulp, conventional papermaking fibers.
9. The method of claim 7 further comprising the steps of transferring the dewatered web from the forming fabric to a transfer fabric traveling at a speed from about 10 to about 40 percent slower than the forming fabric; and transferring the web to a throughdrying fabric.
10. The method of claim 7 wherein the drying step comprises transferring the dewatered web to the surface of a Yankee dryer and further comprising the step of creping the dried macroalgae tissue web from the surface of the Yankee dryer.
11. The method of claim 9 further comprising the steps of transferring the web to the surface of a Yankee dryer and creping the web from the surface of the Yankee dryer.
12. A method of forming a multi-layered macroalgae tissue web comprising the steps of:
a. dispersing a macroalgae dry lap pulp to form a first fiber slurry;
b. dispersing a conventional papermaking pulp to form a second fiber slurry;
c. forming a multi-layered wet web by depositing the first fiber slurry on top of the second fiber slurry onto a forming fabric;
d. dewatering the multi-layered wet web to a consistency of from about 20 to about 30 percent; and
e. drying the multi-layered wet web to a consistency of greater than about 90 percent thereby forming a dried multi-layered macroalgae tissue web, wherein the first layer comprises conventional papermaking fibers and the second layered comprises from about 1 to about 20 percent, by weight of the total tissue web, macroalgae fibers, the tissue web having a basis weight less than about 60 grams per square meter (gsm) and a sheet bulk greater than about 5 cm3g.
13. The method of claim 12 further comprising the step of depositing the second fiber slurry on top of the first fiber slurry thereby forming a three layered wet web.
14. The method of claim 12 wherein the first layer is substantially free from macroalgae fibers.
15. The method of claim 12 wherein the macroalgae dry lap pulp has a moisture content of less than about 10 percent and wherein the macroalgae dry lap pulp comprises from about 1 to about 30 percent, by weight of the dry lap pulp, macroalgae pulp fibers and from about 99 to about 70 percent, by weight of the dry lap pulp, conventional papermaking fibers.
16. The method of claim 12 further comprising the steps of transferring the dewatered web from the forming fabric to a transfer fabric traveling at a speed from about 10 to about 40 percent slower than the forming fabric; and transferring the web to a throughdrying fabric.
17. The method of claim 12 wherein the drying step comprises transferring the dewatered web to the surface of a Yankee dryer and further comprising the step of creping the dried macroalgae tissue web from the surface of the Yankee dryer.
18. The method of claim 17 further comprising the steps of transferring the web to the surface of a Yankee dryer and creping the web from the surface of the Yankee dryer.
19. The method of claim 12 wherein the dried macroalgae tissue web comprises from about 1 to about 20 weight percent macroalgae fibers, the tissue web having a basis weight less than about 60 grams per square meter (gsm) and a sheet bulk greater than about 5 cm3g.