Research on underground wireless video encoding algorithm based on region of interest for interprediction

2011 ◽  
Author(s):  
Tian Hongxian ◽  
Yang Wei
Keyword(s):  
Region Of Interest ◽  
Video Encoding ◽  
Wireless Video

Cross-Layer Optimization for Energy-efficient QoS Support of Multimedia Streams

2010 ◽  
pp. 113-134
Author(s):  
Carolina Blanch Perez del Notario ◽  
Sofie Pollin ◽  
Tong Gan ◽  
Claude Desset ◽  
Antoine Dejonghe ◽  
...  
Keyword(s):  
Video Quality ◽  
Rate Distortion ◽  
Low Complexity ◽  
Video Codec ◽  
Video Encoding ◽  
Cross Layer ◽  
Portable Devices ◽  
Wireless Video ◽  
Cross Layer Optimization ◽  
Multimedia Streams

A major limitation for wireless video communication on portable devices is the limited energy budget. For this reason, efficient usage of the scarce energy becomes a critical design constraint, in addition to meeting the Quality of Service constraints related to the video quality. In this chapter the authors focus on minimizing the energy cost of the two main energy consumers in the handheld wireless video device: the video encoding and wireless communication tasks. For this purpose, they present a cross-layer approach that explores the tradeoff between coding and communication energies. They then exploit the Rate-Distortion-Complexity tradeoffs and flexibility of the Scalable Video Codec. The results show that by adapting the codec configuration at runtime to the specific scenarios up to 50% of the total energy can be saved with marginal video quality loss. Moreover, the approach presented is of low complexity and easily deployable in practical systems.

Graphics to H.264 video encoding for 3D scene representation and interaction on mobile devices using region of interest

2007 ◽  
Author(s):  
Minh Tuan Le ◽  
Congdu Nguyen ◽  
Dae-Il Yoon ◽  
Eun Ku Jung ◽  
Jie Jia ◽  
...  
Keyword(s):  
Mobile Devices ◽  
Region Of Interest ◽  
Video Encoding ◽  
Scene Representation ◽  
3D Scene

A technique for protecting delicate specimens during processing

1989 ◽  
Vol 47 ◽  
pp. 982-983
Author(s):  
R.J. Mount ◽  
R.V. Harrison
Keyword(s):  
Basilar Membrane ◽  
Low Cost ◽  
Organ Of Corti ◽  
Region Of Interest ◽  
Sensory Epithelium ◽  
Physical Damage ◽  
Air Drying ◽  
Specimen Handling ◽  
Two Component

The sensory end organ of the ear, the organ of Corti, rests on a thin basilar membrane which lies between the bone of the central modiolus and the bony wall of the cochlea. In vivo, the organ of Corti is protected by the bony wall which totally surrounds it. In order to examine the sensory epithelium by scanning electron microscopy it is necessary to dissect away the protective bone and expose the region of interest (Fig. 1). This leaves the fragile organ of Corti susceptible to physical damage during subsequent handling. In our laboratory cochlear specimens, after dissection, are routinely prepared by the O-T- O-T-O technique, critical point dried and then lightly sputter coated with gold. This processing involves considerable specimen handling including several hours on a rotator during which the organ of Corti is at risk of being physically damaged. The following procedure uses low cost, readily available materials to hold the specimen during processing ,preventing physical damage while allowing an unhindered exchange of fluids.Following fixation, the cochlea is dehydrated to 70% ethanol then dissected under ethanol to prevent air drying. The holder is prepared by punching a hole in the flexible snap cap of a Wheaton vial with a paper hole punch. A small amount of two component epoxy putty is well mixed then pushed through the hole in the cap. The putty on the inner cap is formed into a “cup” to hold the specimen (Fig. 2), the putty on the outside is smoothed into a “button” to give good attachment even when the cap is flexed during handling (Fig. 3). The cap is submerged in the 70% ethanol, the bone at the base of the cochlea is seated into the cup and the sides of the cup squeezed with forceps to grip it (Fig.4). Several types of epoxy putty have been tried, most are either soluble in ethanol to some degree or do not set in ethanol. The only putty we find successful is “DUROtm MASTERMENDtm Epoxy Extra Strength Ribbon” (Loctite Corp., Cleveland, Ohio), this is a blue and yellow ribbon which is kneaded to form a green putty, it is available at many hardware stores.

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