Patent application number | Description | Published |
20090154820 | CONTEXT ADAPTIVE HYBRID VARIABLE LENGTH CODING - A coding method for an ordered series of quantized transform coefficients of a block of image data, including a context adaptive position coding process to encode the position of clusters of non-zero-valued coefficients, e.g., a multidimensional position coder that uses one of a plurality of code mappings selected according to at least one criterion including at least one context-based criterion, and an amplitude encoding process to encode any amplitudes remaining to be coded, the amplitude coding using one or a plurality of amplitude code mappings selected according to at least one criterion, including a context-based criterion. A context-based selection criterion is meant a criterion that during encoding is known or derivable from one or more previously encoded items of information. Also a coding apparatus, a decoding apparatus, a computer readable medium configured with instructions that when executed implement a coding method, and another medium for a decoding method. | 06-18-2009 |
20110051804 | Multiple Description Coding With Spatial Shifting - Techniques are provided herein to shift at an encoding device a portion of a video sequence by a first predetermined number of pixels horizontally and by a first predetermined number of pixels vertically to produce a shifted first portion of the video sequence. The shifted first portion of the video sequence is encoded to produce a first video description. The portion of the video sequence is shifted by a second predetermined number of pixels horizontally and by a second predetermined number of pixels vertically to produce a shifted second portion of the video sequence. The shifted second portion of the video sequence is encoded to produce a second video description, and the first video description and the second video description are transmitted. The techniques are scalable to shift and encode the portion of the video sequence a plurality of times to produce any number of video descriptions. Similarly, techniques are provided herein to perform such functions in reverse at a decoder. | 03-03-2011 |
20110080946 | LOCALLY VARIABLE QUANTIZATION AND HYBRID VARIABLE LENGTH CODING FOR IMAGE AND VIDEO COMPRESSION - A coding method, apparatus, and storage media with instructions to carry out a method. The method operates on an ordered series of transform coefficients of a block of image data, and for a fixed quantization method, and includes quantizing and encoding the ordered series to form a coded bitstream. The quantizing and encoding uses one or more variable length code (VLC) mappings. The quantizing includes quantizing to have amplitude-1 at least one coefficient that would be quantized by the fixed quantization method to have zero amplitude, quantizing to have zero amplitude at least one coefficient that would be quantized by the fixed quantization method to have amplitude-1, and using the fixed quantization method to quantize any coefficient that is quantized by the fixed quantization method not to have zero amplitude, amplitude-1, or amplitude-2. | 04-07-2011 |
20120257839 | CONTEXT ADAPTIVE HYBRID VARIABLE LENGTH CODING - A coding method for an ordered series of quantized transform coefficients of a block of image data, including a context adaptive position coding process to encode the position of clusters of non-zero-valued coefficients, e.g., a multidimensional position coder that uses one of a plurality of code mappings selected according to at least one criterion including at least one context-based criterion, and an amplitude encoding process to encode any amplitudes remaining to be coded, the amplitude coding using one or a plurality of amplitude code mappings selected according to at least one criterion, including a context-based criterion. A context-based selection criterion means a criterion that during encoding is known or derivable from one or more previously encoded items of information. Also a coding apparatus, a decoding apparatus, a computer readable medium configured with instructions that when executed implement a coding method, and another medium for a decoding method. | 10-11-2012 |
20140119457 | PARALLEL TRANSCODING - Disclosed are various embodiments directed to transcoding a media file in parallel. A media file may be accessed, the media file comprising a bit stream expressing a series of pictures. A first random access point in the bit stream and a second random access point in the bit stream are identified. An input segment of the bit stream is generated, the input segment comprising a starting point, the starting point being the first random access point. One of a plurality of transcoders is selected to transcode the input segment for generating a corresponding output segment, each transcoder being configured to operate concurrently in parallel. The output segment is stored in a memory. | 05-01-2014 |
20140139733 | MANAGING ENCODER PARAMETERS FOR PARALLEL TRANSCODING - Disclosed are various embodiments directed to transcoding a bit stream in parallel. A bit stream may be divided into a plurality of segments, where a plurality of transcoders encode at least a portion of the segments in parallel. If encoding is performed using variable bit rate (BR) encoding, each encoder may encode a segment and vary a BR for the segment. A measured average BR is compared with a target average BR to determine whether to adjust a video quality level (VQL) or any other encoder parameter. A relatively constant subjective quality may be maintained using variable BR encoding while achieving a target average BR. When using constant BR encoding, a VQL or other encoder parameter is used by encoders to achieve relatively constant subjective quality. For example, a relatively continuous quantization parameter between adjacent encoded segments may be achieved. | 05-22-2014 |
20140153909 | AUDIO AND VIDEO MANAGEMENT FOR PARALLEL TRANSCODING - Disclosed are various embodiments directed to transcoding a bit stream comprising audio and video frames that contains discontinuities. The video and/or audio portion of the bit stream may be divided into segments, where some of the segments are transcoded in parallel using a plurality of transcoder devices. In some embodiments, a discontinuity is detected in the bit stream before encoding, where the discontinuity is associated with a shift in a set of time stamps associated with the bit stream. A magnitude of the discontinuity is determined. The transcoding system aligns at least a portion of the audio frames to the series of video frames according to at least the discontinuity and the magnitude of the discontinuity. In other embodiments, the discontinuity is detected after encoding by analyzing time stamps that have been established during the transcoding process. | 06-05-2014 |
20140177717 | REDUCTION OF I-PULSING ARTIFACTS - Various methods and systems are provided for reduction of I-pulsing artifacts. In one example, among others, a method includes modifying at least a portion of a picture to be encoded as an I picture based at least in part upon a picture that precedes the picture. The modification can reduce an I-pulsing artifact associated with the I picture. The modified picture is intra-coded for inclusion in a series of encoded pictures, which may then be transmitted. In another example, an encoder includes adaptive pre-processing circuitry configured to modify at least a portion of a first picture based at least in part upon a second picture that precedes the first picture in a series of video pictures. For example, the modification may be based upon coding noise associated with the preceding picture. Intra-encoding processing circuitry is configured to encode the modified picture as an I picture. | 06-26-2014 |
Patent application number | Description | Published |
20100176404 | METHOD FOR FABRICATING HIGH-POWER LIGHT-EMITTING DIODE ARRAYS - One embodiment of the present invention provides a method for fabricating a high-power light-emitting diode (LED). The method includes etching grooves on a growth substrate, thereby forming mesas on the growth substrate. The method further includes fabricating indium gallium aluminum nitride (InGaAlN)-based LED multilayer structures on the mesas on the growth substrate, wherein a respective mesa supports a separate LED structure. In addition, the method includes bonding the multilayer structures to a conductive substrate. The method also includes removing the growth substrate. Furthermore, the method includes depositing a passivation layer and an electrode layer above the InGaAlN multilayer structures, wherein the passivation layer covers the sidewalls and bottom of the grooves. Moreover, the method includes creating conductive paths which couple a predetermined number of adjacent individual LEDs, thereby allowing the LEDs to share a common power supply and be powered simultaneously to form a high-power LED array. | 07-15-2010 |
20110001120 | SEMICONDUCTOR LIGHT-EMITTING DEVICE WITH DOUBLE-SIDED PASSIVATION - A light-emitting device includes a substrate, a first doped semiconductor layer situated above the substrate, a second doped semiconductor layer situated above the first doped layer, and a multi-quantum-well (MQW) active layer situated between the first and the second doped layers. The device also includes a first electrode coupled to the first doped layer and a first passivation layer situated between the first electrode and the first doped layer in areas other than an ohmic-contact area. The first passivation layer substantially insulates the first electrode from edges of the first doped layer, thereby reducing surface recombination. The device further includes a second electrode coupled to the second doped layer and a second passivation layer which substantially covers the sidewalls of the first and second doped layers, the MQW active layer, and the horizontal surface of the second doped layer. | 01-06-2011 |
20110147705 | SEMICONDUCTOR LIGHT-EMITTING DEVICE WITH SILICONE PROTECTIVE LAYER - One embodiment of the present invention provides a semiconductor light-emitting device which includes: a substrate, a first doped semiconductor layer situated above the substrate, a second doped semiconductor layer situated above the first doped semiconductor layer, a multi-quantum-well (MQW) active layer situated between the first and the second doped semiconductor layers. The device further includes a first electrode coupled to the first doped semiconductor layer, a second electrode coupled to the second doped semiconductor layer, and a silicone protective layer which substantially covers the sidewalls of the first and second doped semiconductor layers, the MQW active layer, and part of the horizontal surface of the second doped semiconductor layer which is not covered by the second electrode. | 06-23-2011 |
Patent application number | Description | Published |
20130000509 | BALLAST HOPPER CAR DISCHARGE DOOR CONTROL SYSTEM - The present invention discloses a ballast hopper car discharge door control system, comprising a control box, said control box comprises electrical pneumatic control system and receiving device; hydraulic system, connected to electrical pneumatic control system; manual control device and remote control device are operated to control opening or closing of ballast hopper car discharge doors; storage battery, configured to provide electrical pneumatic control system in said control box with continuous power supply and remote control device with charging power supply; pressure switch, arranged between control box and storage battery, said pressure switch is operated by pressure of air source to control connecting and disconnecting between storage battery and control box. The ballast hopper car discharge door control system provided by the present invention prevents false on-site operation of discharge door, thus prevents unexpected operation, improves discharging efficiency of ballast hopper car and reduces workload of operator. | 01-03-2013 |
20130019776 | BALLAST HOPPER CAR - The present invention discloses a ballast hopper car, said ballast hopper car comprises an underframe, sidewalls, end walls, discharge doors, coupler draft gears, bogies, a bottom door opening and closing mechanism, underframe accessories, an air brake, an air control system, said air control system comprises an air reservoir and a discharge door control system, said discharge door control system is configured to control working states of ballast hopper car discharge doors. The ballast hopper car provided by the present invention improves discharging efficiency of ballast hopper car and reduces workload of operator. | 01-24-2013 |