Abstract: A multiplexing apparatus includes processing circuitry. The processing circuitry multiplexes a plurality of MMT packets including at least one MMT packet to which first output time information representing a first output time and presentation time information representing a presentation time are added. The processing circuitry rewrites the first output time information to second output time information representing a second output time. The processing circuitry adds a time necessary to multiplex the plurality of MMT packets to the presentation time represented by the presentation time information as a delay time.

Abstract: A transmission system includes a multiplexing apparatus and a message authentication code generating apparatus. The multiplexing apparatus multiplexes MMTP packets for video data and audio data to be transmitted to generate multiplexed data. The message authentication code generating apparatus generates a message authentication code in accordance with a message authentication scheme, using data except for at least either a time stamp or a packet counter in the MMTP packet included in the multiplexed data. The message authentication code generating apparatus adds the message authentication code to the MMTP packet.

Abstract: A multiplexing apparatus includes processing circuitry. The processing circuitry multiplexes a plurality of MMT packets including at least one MMT packet to which first output time information representing a first output time and presentation time information representing a presentation time are added. The processing circuitry rewrites the first output time information to second output time information representing a second output time. The processing circuitry adds a time necessary to multiplex the plurality of MMT packets to the presentation time represented by the presentation time information as a delay time.

Abstract: A method of dividing an input image signal into pixel blocks, and performing inter-prediction on the divided pixel blocks. This method includes selecting predicted motion information from a motion information buffer storing motion information in an encoded region, and predicting motion information of an encoding target block by using the predicted motion information. The method further includes acquiring representative motion information from a plurality of items of motion information in an encoded region in accordance with first information indicating a method of selecting the predicted motion information, thereby obtaining only the representative motion information.

Abstract: A method of dividing an input image signal into pixel blocks, and performing inter-prediction on the divided pixel blocks. This method includes selecting predicted motion information from a motion information buffer storing motion information in an encoded region, and predicting motion information of an encoding target block by using the predicted motion information. The method further includes acquiring representative motion information from a plurality of items of motion information in an encoded region in accordance with first information indicating a method of selecting the predicted motion information, thereby obtaining only the representative motion information.

Abstract: A transmitting system includes a variable-length packet multiplexing apparatus and a transmission slotting apparatus. The variable-length packet multiplexing apparatus generates a variable-length packet. The transmission slotting apparatus stores the variable-length packet in slots forming transmission main signals. The transmission slotting apparatus includes a capacity calculator, an extractor, a remainder calculator, a selector, and a slot information multiplexer. The capacity calculator calculates a data capacity of the transmission main signals for one frame. The extractor extracts a byte number of the variable-length packet. The remainder calculator calculates a remaining capacity of the transmission main signals. The selector stores a predetermined data sequence in a region left in the slots, and outputs the slots storing the data sequence. The slot information multiplexer multiplexes slot information and the slots output by the selector.

Abstract: A transmitting system includes an outputting apparatus and a multiplexing apparatus. The outputting apparatus transmits MMTP packets to which an NTP short format timestamp is added. The multiplexing apparatus multiplexes the MMTP packets. The multiplexing apparatus includes an extractor, a controller, a determiner, a management information generator, a continuity determiner, and a transmission timing adjuster. The transmission timing adjuster writes, for adjustment of a transmission timing of an MMTP packet being close to an MMTP packet in which an NTP short format timestamp value is discontinuous, time information taking a leap second processing into consideration, to the NTP short format timestamp of the MMTP packet.

Abstract: According to an embodiment, an image coding method is for coding an image including a luminance component and color difference components. The method includes acquiring a reference image; and generating a predicted image by interpolating the luminance component and the color difference components in the reference image according to a motion vector. If a size of a block, which is designated as a unit of the interpolation, is equal to or smaller than a predetermined first threshold value, the generating includes inhibiting a bi-directional prediction, and performing only a uni-directional prediction to generate the predicted image according to the motion vector.

Abstract: According to an embodiment, an image coding method is for coding an image including a luminance component and color difference components. The method includes acquiring a reference image; and generating a predicted image by interpolating the luminance component and the color difference components in the reference image according to a motion vector. If a size of a block, which is designated as a unit of the interpolation, is equal to or smaller than a predetermined first threshold value, the generating includes inhibiting a bi-directional prediction, and performing only a uni-directional prediction to generate the predicted image according to the motion vector.

Abstract: A transmission system includes a multiplexing apparatus and a message authentication code generating apparatus. The multiplexing apparatus multiplexes MMTP packets for video data and audio data to be transmitted to generate multiplexed data. The message authentication code generating apparatus generates a message authentication code in accordance with a message authentication scheme, using data except for at least either a time stamp or a packet counter in the MMTP packet included in the multiplexed data. The message authentication code generating apparatus adds the message authentication code to the MMTP packet.

Abstract: According to an embodiment, an image coding method is for coding an image including a luminance component and color difference components. The method includes acquiring a reference image; and generating a predicted image by interpolating the luminance component and the color difference components in the reference image according to a motion vector. If a size of a block, which is designated as a unit of the interpolation, is equal to or smaller than a predetermined first threshold value, the generating includes inhibiting a bi-directional prediction, and performing only a uni-directional prediction to generate the predicted image according to the motion vector.

Abstract: According to an embodiment, an image coding method is for coding an image including a luminance component and color difference components. The method includes acquiring a reference image; and generating a predicted image by interpolating the luminance component and the color difference components in the reference image according to a motion vector. If a size of a block, which is designated as a unit of the interpolation, is equal to or smaller than a predetermined first threshold value, the generating includes inhibiting a bi-directional prediction, and performing only a uni-directional prediction to generate the predicted image according to the motion vector.

Abstract: A multiplexing apparatus includes processing circuitry. The processing circuitry multiplexes a plurality of MMT packets including at least one MMT packet to which first output time information representing a first output time and presentation time information representing a presentation time are added. The processing circuitry rewrites the first output time information to second output time information representing a second output time. The processing circuitry adds a time necessary to multiplex the plurality of MMT packets to the presentation time represented by the presentation time information as a delay time.

Abstract: An MMT transmission system includes first and second material output devices, first and second multiplexing devices, first and second encryption processing device, and a switching device. The first encryption processing device encrypts a first payload, except for a first MPU sequence number, of a first MMTP packet included in first multiplexed data output from the first multiplexing device. The second encryption processing device encrypts a second payload, except for a second MPU sequence number, of a second MMTP packet included in second multiplexed data output from the second multiplexing device. The switching device acquires a first MPU boarder from the first MPU sequence number, a second MPU boarder from the second MPU sequence number, and switches transmissions of the multiplexed data at these boarders.

Abstract: According to an embodiment, an image coding method is for coding an image including a luminance component and color difference components. The method includes acquiring a reference image; and generating a predicted image by interpolating the luminance component and the color difference components in the reference image according to a motion vector. If a size of a block, which is designated as a unit of the interpolation, is equal to or smaller than a predetermined first threshold value, the generating includes inhibiting a bi-directional prediction, and performing only a uni-directional prediction to generate the predicted image according to the motion vector.

Abstract: According to an embodiment, an image coding method is for coding an image including a luminance component and color difference components. The method includes acquiring a reference image; and generating a predicted image by interpolating the luminance component and the color difference components in the reference image according to a motion vector. If a size of a block, which is designated as a unit of the interpolation, is equal to or smaller than a predetermined first threshold value, the generating includes inhibiting a bi-directional prediction, and performing only a uni-directional prediction to generate the predicted image according to the motion vector.

Abstract: An example image decoding apparatus and method involves acquiring encoded data including an image code sequence corresponding to a slice of a plurality of slices obtained by dividing a picture of a moving image and first timing information indicating a first time at which the slice is to be decoded and no underflow or overflow occurs in a first virtual reception buffer from which the image code sequence is output in a slice unit. The image code sequence is decoded on the basis of the first timing information.

Abstract: According to an embodiment, an information processor includes a first decoder, a controller and a display unit. The first decoder decodes the first video encoded data at a first speed to generate a first video. When the first video encoded data is received earlier than the second video encoded data, the controller controls the first speed so as to generate a period in which the first speed becomes lower than a ×1 speed until second time information of the second decoder catches up with first time information of the first decoder. When the first video encoded data is received earlier than the second video encoded data, the first video is displayed at the first speed until the second time information catches up with the first time information.

Abstract: A moving image encoding method includes outputting encoded data that comprises an image code sequence corresponding to slices of a moving image and first timing information indicating times at which the slices are to be decoded.

Abstract: According to an embodiment, an image processing apparatus includes a first decoding unit, a selection unit and a generation unit. The first decoding unit generates a first decoded image by decoding first encoded data. The selection unit selects one of the first decoded image and the second decoded image for each display timing. The generation unit generates a display image to be displayed at a display timing for which the first decoded image is selected, based on the first decoded image. The second decoded image has a higher resolution than that of the first decoded image. The first decoded image and the second decoded image are different in either a frame rate or a display timing phase.