What we claim is:
1. A sound field correction circuit which receives signals of at least 2 channels encoded for a multi-channel surround effect as input signals and outputs multi-channel surround signals, comprising:
inputting means for receiving at least a first signal and a second signal encoded for a multi-channel surround effect as input signals; and
decoding means for decoding the first and second signals to produce multi-channel surround signals;
said decoding means including addition means for adding the first and second signals to produce a sum signal, and subtraction means for subtracting the second signal from the first signal to produce a difference signal.
2. A sound field correction circuit according to claim 1, wherein said decoding means further includes sum signal level adjustment means for receiving the sum signal, adjusting a level of the sum signal and outputting the sum signal of the adjusted level, and difference signal level adjustment means for receiving the difference signal, adjusting a level of the difference signal and outputting the difference signal of the adjusted level.
3. A sound field correction circuit according to claim 1, wherein said decoding means includes first level adjustment means for adjusting the first signal and outputting the first signal of the adjust level to said addition means, second level adjustment means for adjusting the second signal and outputting the second signal of the adjust level to said addition means, third level adjustment means for adjusting the first signal and outputting the first signal of the adjust level to said subtraction means, and fourth level adjustment means for adjusting the second signal and outputting the second signal of the adjust level to said subtraction means.
4. A sound field correction circuit according to claim 2, further comprising a virtualizer for receiving at least the first and second signals, an output of said sum signal level adjustment means and an output of said difference signal level adjustment means and outputting a desired number of channels of surround signals.
5. A sound field correction circuit according to claim 1, wherein said decoding means includes noise reduction means connected to said subtraction means.
6. A sound field correction circuit according to claim 5, wherein said noise reduction means of said decoding means performs Dolby B deformation noise reduction processing.
7. A sound field correction method wherein signals of at least 2 channels encoded for a multi-channel surround effect are received as input signals and multi-channel surround signals are outputted, comprising:
an inputting step of receiving at least a first signal and a second signal encoded for a multi-channel surround effect as input signals; and
a decoding step of decoding the first and second signals to produce multi-channel surround signals;
the decoding step including an addition step of adding the first and second signals to produce a sum signal, and a subtraction step of subtracting the second signal from the first signal to produce a difference signal.
8. A sound field correction method according to claim 7, wherein the decoding step includes a sum signal level adjustment step of receiving the sum signal, adjusting a level of the sum signal and outputting the sum signal of the adjusted level, and a difference signal level adjustment step of receiving the difference signal, adjusting a level of the difference signal and outputting the difference signal of the adjusted level.
9. A sound field correction method according to claim 7, wherein the decoding step includes a first level adjustment step of adjusting the first signal and outputting the first signal of the adjust level to the addition step, a second level adjustment step of adjusting the second signal and outputting the second signal of the adjust level to the addition step, a third level adjustment step of adjusting the first signal and outputting the first signal of the adjust level to the subtraction step, and a fourth level adjustment step of adjusting the second signal and outputting the second signal of the adjust level to the subtraction step.
10. A sound field correction method according to claim 8, further comprising a step of receiving at least the first and second signals, an output of the sum signal level adjustment step and an output of the difference signal level adjustment step and outputting a desired number of channels of surround signals.
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 negative electrode composition for a rechargeable lithium battery, the negative electrode composition comprising:
a negative active material and a crystalline carbon conductive material,
wherein:
the negative active material comprises soft carbon, and
the crystalline carbon conductive material comprises graphite having an average particle diameter (D90) of about 1 micrometer to about 20 micrometers.
2. The negative electrode composition of claim 1, wherein the crystalline carbon conductive material is included in an amount of about 0.5 wt % to about 45.5 wt % based on the total amount of the negative electrode composition.
3. The negative electrode composition of claim 1, wherein the crystalline carbon conductive material is included in an amount of about 0.5 wt % to about 25 wt % based on the total amount of the negative electrode composition.
4. The negative electrode composition of claim 1, wherein the crystalline carbon conductive material is a highly anisometric flake material.
5. The negative electrode composition of claim 1, wherein the crystalline carbon conductive material has a scoff density of less than or equal to about 0.2 gm3.
6. The negative electrode composition of claim 1, wherein the crystalline carbon conductive material has a specific surface area of about 5 to about 30 m2g.
7. The negative electrode composition of claim 1, wherein the crystalline carbon conductive material has a dibutylphthalate (DBP) absorption of about 100 to about 300 g100 g.
8. The negative electrode composition of claim 1, wherein the crystalline carbon conductive material comprises ash in an amount of less than or equal to about 0.1 wt % based on the total amount of the crystalline carbon conductive material.
9. The negative electrode composition of claim 1, wherein the crystalline carbon conductive material further comprises denka black.
10. The negative electrode composition of claim 1, wherein the crystalline carbon conductive material has a (14700) peak at 2\u03b8 of about 26\xb0 in X-ray diffraction (XRD) analysis.
11. The negative electrode composition of claim 1, further comprising a binder.
12. The negative electrode composition of claim 11, wherein the binder is selected from carboxylmethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, polyvinylidene fluoride, polytetrafluoroethylene, polyethylene, polypropylene, a styrene-butadiene rubber, a polybutadiene, a butyl rubber, a fluorine rubber, polyethyleneoxide, polyvinylalcohol, poly(metha)acrylic acid and a salt thereof, polyvinylpyrrolidone, polyepichlorohydrin, polyphosphazene, polyacrylonitrile, polystyrene, polyvinylpyridine, chlorosulfonated polyethylene, a latex, a polyester resin, an acrylic resin, a phenolic resin, an epoxy resin, a polymer of propylene and C2 to C8 olefin, a copolymer of (meth)acrylic acid and (meth)acrylic acid alkyl ester, and combinations thereof.
13. A negative electrode for a rechargeable lithium battery, the negative electrode comprising:
a current collector, and
the negative electrode composition on the current collector according to claim 1.
14. A rechargeable lithium battery, the rechargeable battery comprising:
the negative electrode according to claim 13;
a positive electrode comprising a positive active material;
a separator between the positive electrode and the negative electrode; and
an electrolyte.
15. The rechargeable lithium battery of claim 14, wherein the positive active material comprises at least one selected from a lithium cobalt-based oxide, a lithium nickel cobalt manganese-based oxide, a lithium nickel cobalt aluminum-based oxide, and an olivine-based oxide.
16. The rechargeable lithium battery of claim 15, wherein the positive active material further comprises activated carbon.
17. The rechargeable lithium battery of claim 16, wherein the activated carbon is included in an amount of about 0.5 wt % to about 50 wt % based on the total amount of the positive active material.
18. The rechargeable lithium battery of claim 14, wherein the positive electrode further comprises a conductive material.
19. The rechargeable lithium battery of claim 18, wherein the conductive material comprises at least one selected from natural graphite, artificial graphite, carbon black, acetylene black, ketjen black, a carbon fiber, a carbon nanotube, a metal powder, a metal fiber, and a conductive polymer.
20. The rechargeable lithium battery of claim 14, wherein the rechargeable lithium battery is configured as a battery for ISG (integrated starter generator).