摘要:
The present invention allows usable information to be selected by comparing information regarding encoding with conditions regarding encoding processing. When delay modes, picture structures, and pulldown modes do not match each other between previous encoding time and re-encoding time, parameters are not reused. When they match and image frames do not match, a picture type is reused. When a bit rate in the previous encoding is smaller than that in the current encoding and a chroma format is larger than the current chroma format, a picture type and a motion vector are reused. When the conditions are not satisfied, parameters are supplied and received and a determination is made as to whether or not chroma formats match each other. When the chroma formats do not match each other, picture-type information, motion-vector information, and quantization-value information are reused. When the chroma formats match each other, stream data input to a decoding unit is output. The present invention can be applied to an encoding unit, an encoding device, or a transcoder.
摘要:
The present invention can code an I-picture that satisfies a predetermined condition using parameter information. When it is determined at step S1 that a picture type is the I-picture, it is determined at step S2 whether or not the phase of a macro block in previous coding agrees with that of the macro block of present coding. When the phases of the macro blocks agree with each other, it is determined at step S3 whether or not amount of generated code in a unit of picture in decoding≦target amount of code×α is satisfied. When the condition is satisfied, it is determined at step S4 whether or not an image frame of previous coding is the same as that of previous coding. When the image frames are not the same, the information of a picture type, motion vector, and a quantized value included in the parameter information is reused, whereas when the image frames are the same, the stream data input to a decoder is output. When the above condition is not satisfied, the parameters are not reused. The present invention can be applied to a coder, a coding apparatus, an information recording apparatus, an information reproducing apparatus, or a transcoder.
摘要:
A coding apparatus and method is disclosed by which quantization index data can be determined without referring to a virtual buffer capacity initialized in response to a scene change. ME residual information is acquired first, and it is discriminated whether or not the ME residual information is higher than a threshold value. If it is discriminated that the ME residual information is higher than the threshold value, then the initial buffer capacity of a virtual buffer is updated. On the other hand, if it is discriminated that the ME residual information is equal to or lower than the threshold value, then it is discriminated whether or not the picture being currently processed is a picture next to a scene change or is a next picture of the same type as that of a picture with which a scene change has occurred. If it is discriminated that the picture being processed is a picture next to a scene change or a next picture of the same type, then the initial buffer capacity is calculated and updated. Further, an average value of the ME residual information is updated. The invention can be applied to a video encoder.
摘要:
A history-information/parameter-reuse disable period is set, starting from a P picture temporally one picture before an editing point to the first I picture after the picture subsequent to the editing point for a predetermined number n (for example, n=8) of pictures. If the first I picture is positioned close to an editing point only for a few pictures, the reuse of parameters or history information is not started from this I picture, but is started from the I picture after the picture subsequent to the editing point for a predetermined number n (for example, n=8) of pictures. The present invention is applicable to coding devices or transcoders.
摘要:
In a horizontal type scroll compressor an external end of a volute (2b) of a fixed scroll (2) is extended near to an external end side of a volute (3b) of a movable scroll (3). By the extension of the volute (2b), inlet ports (22, 23) opening to compression rooms (RA, RB) respectively are disposed near to each other and are located at an upper level in a closed casing (1). An inlet passage (24) is formed at the top of a housing (4) which divides the closed casing (1) into a compression element chamber (12A) and a motor chamber (12B). The opening position of an inlet pipe (11) is displaced circumferentially with respect to the inlet passage (24). The inlet passage (24) is displaced circumferentially with respect to the inlet ports (22, 23) of the compression rooms (RA, RB). The inlet passage (24) is displaced forward in a traveling direction of the movable scroll (3) with respect to the inlet ports (22, 23).
摘要:
A single-screw compressor includes a screw rotor, a cylinder wall in which the screw rotor is rotatably accommodated, a driving mechanism which variably drives the screw rotor according to a load, and a slide valve which is provided in a slide groove formed in the cylinder wall. The slide valve faces an outer circumferential surface of the screw rotor to be movable in an axial direction, and to adjust a discharge start position by being moved in the axial direction according to the operating capacity. A discharge side end surface of the slide valve extends in a direction corresponding to a screw land of the screw rotor to which the discharge side end surface faces when the slide valve is moved to a position corresponding to a part load operation state.
摘要:
A screw compressor includes a screw rotor, a gate rotor, a drive mechanism to rotate the screw rotor, a cylinder, a discharge port and an adjustment mechanism. The screw rotor has an outer periphery with a helical groove engaged with radially arranged gates of the gate rotor. First and second axial ends of the screw rotor form suction and discharge sides, respectively. The cylinder accommodates the screw rotor to define a compression chamber in the helical groove. Fluid in the coin cession chamber flows through the discharge port toward the discharge side of the screw rotor. The adjustment mechanism is configured to adjust a compression ratio of the compression chamber within a predetermined. range. The adjustment mechanism adjusts the compression ratio to a minimum compression ratio immediately before or when operation of the adjustment mechanism is stopped.
摘要:
The present invention allows usable information to be selected by comparing information regarding encoding with conditions regarding encoding processing. When delay modes, picture structures, and pulldown modes do not match each other between previous encoding time and re-encoding time, parameters are not reused. When they match and image frames do not match, a picture type is reused. When a bit rate in the previous encoding is smaller than that in the current encoding and a chroma format is larger than the current chroma format, a picture type and a motion vector are reused. When the conditions are not satisfied, parameters are supplied and received and a determination is made as to whether or not chroma formats match each other. When the chroma formats do not match each other, picture-type information, motion-vector information, and quantization-value information are reused. When the chroma formats match each other, stream data input to a decoding unit is output. The present invention can be applied to an encoding unit, an encoding device, or a transcoder.
摘要:
The present invention allows usable information to be selected by comparing information regarding encoding with conditions regarding encoding processing. When delay modes, picture structures, and pulldown modes do not match each other between previous encoding time and re-encoding time, parameters are not reused. When they match and image frames do not match, a picture type is reused. When a bit rate in the previous encoding is smaller than that in the current encoding and a chroma format is larger than the current chroma format, a picture type and a motion vector are reused. When the conditions are not satisfied, parameters are supplied and received and a determination is made as to whether or not chroma formats match each other. When the chroma formats do not match each other, picture-type information, motion-vector information, and quantization-value information are reused. When the chroma formats match each other, stream data input to a decoding unit is output. The present invention can be applied to an encoding unit, an encoding device, or a transcoder.
摘要:
A cylinder body 2 is sandwiched between a front head 7 and a rear head 8 and a high pressure port 10 is formed in the front head 7. A roller 3 of a piston 5 is configured such that top and bottom end surfaces thereof have different widths. The roller 3 is arranged such that one of the end surfaces having a larger width faces the front head 7.