We present an efficient rate control strategy for H.264 in order to maximize the video quality by appropriately determining the quantization parameter (QP) for each macroblock. To break the chicken-and-egg dilemma resulting from QP-dependent ratedistortion optimization (RDO) in H.264, a preanalysis phase is conducted to gain the necessary source information, and then the coarse QP is decided fo...

I present a frequency-independent three-dimensional (3-D) compressional wave attenuation model (indicated by quality factor Qp) for the crust and uppermost mantle of Northern and central California. The tomographic inversion used t∗ values measured from amplitude spectra of 80,988 P wave arrivals of 3247 events recorded by 463 network stations through a 3-D seismic velocity model. The model has...

from Quillen’s K-groups to the étale cohomology groups with coefficients in the Tate twist Zp(j) ([8], [25]). When K is a local field, it is a long-standing problem whether the maps Ki(X) ⊗ Qp → H ét (X,Qp(j)) for 2j > i are surjective, in relation to the Beilinson conjectures (cf. [11] §3). The main result of this paper is to give an affirmative answer to this problem for K2 of the Tate curves...

We present the first coordinated observations of quasi-periodic (QP) radar echoes from sporadic-E (Es) field-aligned irregularities (FAIs), OI 557.7-nm airglow, and neutral winds in a common volume over Shigaraki, Japan (34.9 N, 136.1 E) on the night of 5 August 2002 during the SEEK-2 campaign. QP echo altitudes of 90–110 km were lower than usual by 10 km, enabling us to make a detailed compari...

Experiments aboard the Ulysses spacecraft discovered quasi-periodic bursts of relativistic electrons and of radio emissions with ∼ 40−minute period (QP-40) from the south pole of Jupiter in February 1992. Such polar QP-40 burst activities were found to correlate well with arrivals of high-speed solar winds at Jupiter. We advance the physical scenario that the inner radiation belt (IRB) within ∼...

It is known that Jovian radio and high energy electron emissions are observed near Earth. The question we address in this study whether the quasi-periodic ~10 h ~40/15–20 min (QP-10 h, QP-40/15–20 min) energetic particle magnetic field periodicities by Ulysses during its distant encounter with Jupiter 2003 were also detectable as far Earth’s orbit. Surprisingly, found at end of extreme Hallowee...