1. A heat sink comprising: a heat transmitting member for transmitting heat generated by a heating component; a holding section for holding the heat transmitting member; and a heat sink body having a space in which a cooling fan having at least blades and a drive motor is embedded, wherein a portion of the holding section for holding the heat transmitting member, the portion being located below the space, is cut out.
2. The heat sink according to claim 1, wherein the heat sink body is accommodated in a box for controlling a flow of air generated by the cooling fan.
3. The heat sink according to claim 1, further comprising a printed board for holding the cooling fan, wherein the printed board has ventilation holes in which an air flow generated by the fan assembly flows, and a portion of the drive circuit to drive the motor is mounted on the printed board.
4. The heat sink according to claim 1, further comprising a cover to be put on the heat sink body, wherein the cover has a spacer, the height of which is sufficiently large for forming an air gap on the surface of the heat sink body, and also the cover has a hole to fix a bearing of the cooling fan.
5. The heat sink according to claim 1, wherein peripheries of the blades in the depth direction are surrounded by a venturi.
6. A heat sink comprising: a heat transmitting member for transmitting heat generated by a heating component; a holding section for holding the heat transmitting member; and a heat sink body having a space in which a cooling fan having at least blades and a drive motor is embedded, the heat sink body being arranged at a position different from a position at which the heating component is arranged, wherein heat generated by the heating component is transmitted by the heat transmitting member and cooled by the heat sink body.
7. An information processor comprising: a heat transmitting member for transmitting heat generated by a heating component; a holding section for holding the heat transmitting member; and a heat sink body having a space in which a cooling fan having at least blades and a drive motor is embedded, the heat sink body being arranged at a position different from a position at which the heating component is arranged, wherein heat generated by the heating component is transmitted by the heat transmitting member and cooled by the heat sink body.
8. An information processor comprising: a heat transmitting member for transmitting heat generated by a heating component; a holding section for holding the heat transmitting member; and a heat sink body having a space in which a cooling fan having at least blades and a drive motor is embedded, wherein the heat sink body is embedded in a frame of the apparatus.
9. The information processor according to claim 8, further comprising rod-shaped fins for partially closing ventilation holes of the cooling fan embedded in the heat sink body.
10. The information processor according to claim 8, wherein peripheries of the blades in the depth direction are surrounded by a venturi.
11. The information processor according to claim 8, wherein ventilation holes are formed on a surface of the heat sink body located on the side of the heating component.
12. The information processor according to claim 8, wherein suction holes connected to the heat sink body are formed in the frame of the apparatus, and ventilation holes are formed in the heat sink body corresponding to the suction holes.
13. A heat sink comprising: a heat conveyance member for transmitting heat generated by a heating component; and a centrifugal blower section composed of a cover having blades and a drive motor and also composed of a casing made of a highly conductive material, wherein the heat conveyance member adheres to an outer circumference of the casing or a portion of the outer circumference of the casing.
14. A heat sink comprising: a heat conveyance member for transmitting heat generated by a heating component; and a cross flow fan section composed of blades and a drive motor and also composed of a casing made of a highly conductive material, wherein the heat conveyance member adheres to an outer circumference of the casing or a portion of the outer circumference of the casing.
15. A heat sink comprising: a heat conveyance member for transmitting heat generated by a heating component; a heat exchanging section adhering to the heat conveyance member for exchanging heat; and an axial blower, wherein the heat exchanging section has a ventilating passage inside in the height direction of the blower, and the heat conveyance member adheres to the heat exchanging section.
16. A heat sink comprising: a heat conveyance member for transmitting heat generated by a heating component; an axial blower section having blades, a drive motor and a casing made of a highly conductive material; and a heat exchanging section to which the heat conveyance member adheres so as to exchange heat, wherein the casing is extended in the height direction to form the heat exchanging section, and the heat conveyance member is made to adhere to the heat exchanging section.
17. A heat sink comprising: a heat conveyance member for transmitting heat generated by a heating component; and an axial blower section having blades, a drive motor and a casing made of a highly conductive material, wherein the heat conveyance member is made to adhere onto the outer circumference of the casing or a portion of the outer circumference of the casing.
18. A heat sink comprising: a heat conveyance member for transmitting heat generated by a heating component; and an axial blower section having blades, a drive motor and a casing made of a highly conductive material, wherein the casing is composed of the heat conveyance member.
19. A heat sink comprising: a heat conveyance member for transmitting heat generated by a heating component; and a heat sink body into which a fan and heat radiating fins are incorporated, wherein the heat conveyance member is made to adhere onto the side of the heat sink body.
20. The heat sink according to claim 13, 14, or 17, wherein the casing is divided into parts within the height of the adhering section in which the casing and the heat conveyance member adhere to each other.
21. The heat sink according to claim 13, 15, 16, or 17, wherein the heat conveyance member is formed into a cylinder or a portion of the heat conveyance member is formed into a cylinder, and the heat conveyance member is made to adhere to the casing.
22. The heat sink according to claim 13, 14, 15, 16, 17, or 19, wherein a section of the groove of the casing or a section of the groove of the heat sink body, into which the heat conveyance member is made to adhere, is formed into a circle.
23. The heat sink according to claim 13, 14, 15, 16, 17, or 19, wherein a section of the casing and a section of the heat sink body, to which the heat conveyance member is made to adhere, are formed into a rectangle.
24. The heat sink according to claim 13 or 14, wherein heat radiating fins made of the same material as that of the casing are formed in the heat sink body close to the discharge port of the fan.
25. The heat sink according to claim 13 or 14, wherein the heat exchanging section to exchange heat with the heat conveyance member is provided on the casing portion exposed to a high air pressure from the fan, and on the side portion of the heat sink body adjacent to the casing portion.
26. The heat sink according to claim 13, wherein the height of the heat radiating fin is increased to the height of the air gap formed in the sucking section.
27. An information processor comprising: a suction port of the heat sink arranged on one surface of the corner section of the apparatus; and a discharge port of the heat sink arranged on the other surface of the corner section of the apparatus.
28. The heat sink according to claim 16, wherein the heat sink body for heat radiation is arranged at the edge close to the heat exchanging section.
29. The heat sink according to claim 15 or 16, wherein an air gap is formed between the blades of the fan and the heat exchanging section.
30. A heat sink comprising: a heat conveyance member for transmitting heat generated by a heating component; a heat exchanging section adhering to the heat conveyance member so as to exchange heat; and an axial fan, wherein a portion of the heat exchanging section is arranged on the side of the fan, fins are arranged at the suction or discharge port of the fan, and the heat conveyance member is made to adhere to the heat exchanging section.
31. A heat sink comprising: a heat transmitting member for transmitting heat generated by a heating component; and a cross flow fan section in which the direction of a suction wind and the direction of a discharge wind are the same, including fan blades, a drive motor and a casing made of a heat conductive material, wherein the heat transmitting member is fixed to the outer circumference of the casing or fixed to a portion of the outer circumference of the casing.
32. The heat sink according to claim 13 or 14, wherein radiating fins are provided in a portion close to the discharge port of the fan, the radiating fins are made of the same material as that of the casing, the heights of the radiating fins are smaller than the height of the discharge port, and a space is formed in an upper portion of the radiating fins.
33. The heat sink according to claim 13 or 14, wherein the casing is formed into a shape so that the radius of curvature of the heat transmitting member attached along the outside of the casing can be minimized as long as the heat transmitting member can be formed.
34. A heat sink comprising: a heat transmitting member for transmitting heat generated by a heating component; fan blades; a drive motor; and a casing made of a heat conductive material, wherein the bottom of the casing is cut away to the same size as that of the fan blades, or to a size larger than that of the fan blades.
35. The heat sink according to claim 34, wherein a plurality of protrusions or spaces are provided on the bottom surface of the casing.
36. The heat sink according to claim 34, wherein a flat type heat transmitting member is attached onto the bottom surface of the casing so that the heat transmitting area of the heat transmitting member can come into contact with the bottom surface of the casing.
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 video encoding method comprising:
producing a fast transform matrix based on a first transform matrix which is used for performing a frequency transformation on block which has a predetermined size;
producing a transformed block by transforming the block which has the predetermined size by using the fast transform matrix; and
performing scaling with respect to the transformed block in order to correct a difference between the first transform matrix and the fast transform matrix.
2. The video encoding method of claim 1, wherein the producing of the fast transform matrix comprises producing the fast transform matrix by substituting values based on a trigonometrical function from among elements of the first transform matrix with dyadic rationals.
3. The video encoding method of claim 1, wherein the producing the fast transform matrix comprises producing the fast transform matrix by rounding up, to a respective nearest integer, a value obtained by multiplying each of the elements of the first transform matrix by a predetermined constant.
4. The video encoding method of claim 1, the performing of the scaling comprises one of a) using a vector product operation of an N\xd7N transformed block and a predetermined scaling matrix; and b) multiplying the N\xd7N transformed block by a predetermined scaling constant.
5. The video encoding method of claim 4, wherein each of the scaling matrix and the scaling constant is determined based on a quantization parameter.
6. The video encoding method of claim 5, wherein, when QP denotes the quantization parameter, six scaling matrices corresponding to respective cases where the quantization parameter QP is respectively labeled as zero, one, two, three, four, and five and a scaling constant are set, and one is selected from among the six scaling matrices and the scaling constant based on a value of (QP mod 6).
7. The video encoding method of claim 4, wherein six scaling matrices are set for an M\xd7M block based on the quantization parameter, and a scaling matrix obtained by multiplying each of the elements of the six scaling matrices set for the M\xd7M block by MN is used as a scaling matrix for an N\xd7N block which has a size which is smaller than or greater than a size of the M\xd7M block, wherein M is an integer.
8. A video decoding method comprising:
receiving a quantized transformed block which has a predetermined size;
performing descaling with respect to the quantized transformed block in order to correct a difference between a first inverse-transform matrix which is used for performing a frequency inverse-transformation on the quantized transformed block and a fast inverse-transform matrix which is produced based on the first inverse-transform matrix; and
producing an inversely-transformed block by inversely transforming a descaled transformed block which is obtained by the descaling by using the fast inverse-transform matrix.
9. The video decoding method of claim 8, wherein the fast inverse-transform matrix is produced by substituting values based on a trigonometrical function from among elements of the first inverse-transform matrix which is used for performing a one-dimensional inverse discrete cosine transformation with dyadic rationals.
10. The video decoding method of claim 8, wherein the fast inverse-transform matrix is produced by rounding up, to a respective nearest integer, a value obtained by multiplying each of the elements of the first inverse-transform by 2n, wherein n is an integer.
11. The video decoding method of claim 8, wherein the performing of the descaling comprises one of a) using a vector product operation with respect to a quantized N\xd7N transformed block and a predetermined descaling matrix; and b) multiplying the N\xd7N inversely-transformed block by a predetermined descaling constant.
12. The video decoding method of claim 11, wherein each of the descaling matrix and the descaling constant is determined based on a quantization parameter.
13. The video decoding method of claim 12, wherein, when QP denotes the quantization parameter, six descaling matrices corresponding to respective cases where the quantization parameter QP is respectively labeled as zero, one, two, three, four, and five and a descaling constant are set, and one is selected from among the six descaling matrices and the descaling constant based on a value of (QP mod 6).
14. The video decoding method of claim 13, wherein six descaling matrices are set for an M\xd7M block based on the quantization parameter, and a descaling matrix obtained by multiplying each of the elements of the six scaling matrices set for the M\xd7M block by MN is used as a descaling matrix for an N\xd7N block which has a size which is smaller than or greater than a size of the M\xd7M block.
15. The video decoding method of claim 13, wherein, when i=(QP mod 6), the descaling constant DQMati comprises DQMat0=40, DQMat1=45, DQMat2=51, DQMat3=57, DQMat4=64, and DQMat5=72.
16. A video encoder apparatus, comprising:
a transformer which produces a fast transform matrix based on a first transform matrix which is used for performing a frequency transformation on a first block, and which transforms the first block by using the fast transform matrix in order to produce a fast-transformed first block; and
a quantizer which performs scaling with respect to the fast-transformed first block such that a difference between the fast-transformed first block and a result of transforming the first block by using the first transform matrix is reduced.
17. The video encoder apparatus of claim 16, further comprising:
a predictor which receives an input image, divides the received input image into at least one block, and generates a prediction block by performing one of inter prediction and intra prediction on the at least one block; and
a subtracter which subtracts the prediction block from corresponding data which is included in the input image in order to produce a residual, and provides the residual to the transformer.
18. The video encoder apparatus of claim 17, further comprising an entropy encoder which receives a result of the scaling which is performed with respect to the fast-transformed first block and which generates a bitstream by performing variable length encoding on the received result of the scaling.
19. The video encoder apparatus of claim 16, wherein the transformer produces the fast transform matrix by substituting values based on a trigonometrical function from among elements of the first transform matrix with dyadic rationals.
20. The video encoder apparatus of claim 16, wherein the transformer produces the fast transform matrix by rounding up, to a respective nearest integer, each value obtained by multiplying each of the elements of the first transform matrix by a predetermined constant.
21. The video encoder apparatus of claim 16, wherein the quantizer performs the scaling by using a vector product operation of an N\xd7N transformed block and a predetermined scaling matrix.
22. The video encoder apparatus of claim 16, wherein the quantizer performs the scaling by multiplying an N\xd7N transformed block by a predetermined scaling constant.
23. A video decoder apparatus, comprising:
receiving a quantized transformed block which has a predetermined size;
a dequantizer which performs descaling with respect to a received quantized transformed first block which has been generated by transforming a first block using a first transform matrix; and
an inverse transformer which inversely transforms a result of the descaling by using a fast inverse-transform matrix which is produced based on a first inverse-transform matrix which relates to the first transform matrix,
wherein the dequantizer performs the scaling such that a difference between a respective at least one element of the fast inverse-transform matrix and a corresponding at least one element of the first inverse-transform matrix is reduced.
24. The video decoder apparatus of claim 23, further comprising an entropy decoder which extracts prediction mode information, reference picture information, and residual information relating to a current block to be decoded and which provides a result of the extracting to the dequantizer.
25. The video decoder apparatus of claim 23, wherein the fast inverse-transform matrix is produced by substituting values based on a trigonometrical function from among elements of the first inverse-transform matrix with dyadic rationals.
26. The video decoder apparatus of claim 23, wherein the fast inverse-transform matrix is produced by rounding up, to a respective nearest integer, each value obtained by multiplying each of the elements of the first inverse-transform by 2n, wherein n is an integer.
27. The video decoder apparatus of claim 23, wherein the dequantizer performs descaling by using a vector product operation with respect to a quantized N\xd7N transformed block and a predetermined descaling matrix.
28. The video decoder apparatus of claim 23, wherein the dequantizer performs descaling by multiplying a quantized N\xd7N inversely-transformed block by a predetermined descaling constant.