AUDIO STREAM COMBINING APPARATUS, METHOD AND PROGRAM
First Claim
1. An audio stream combining apparatus that generates one audio stream by joining two audio streams composed of compressed data that is generated by overlap transform;
- wherein the access units that serve as units of decoding of said two audio streams are designated as group 1 access units and group 2 access units, respectively;
wherein the frames that are produced by decoding said two audio streams are designated as group 1 frames and group 2 frames, respectively; and
wherein the access units that are produced by encoding the mixed frames that are generated by mixing said group 1 frames and group 2 frames are designated as group 3 access units;
whereinsaid audio stream combining apparatus comprises;
an input unit that receives the input of group 1 access units and group 2 access units;
a decoding unit that generates group 1 frames by decoding the group 1 access units that are input by said input unit and group 2 frames by decoding said group 2 access units; and
a combining unit using the access units employed to decode the frames as a frame of reference, that selectively mixes the plurality of group 1 frames and the plurality of group 2 frames decoded by said decoding unit, that generates mixed frames, that generates prescribed number of group 3 access units by encoding said mixed frames, and that joins said plurality of group 1 frames and said plurality of group 2 frames, using said prescribed number of group 3 access units as a joint, such that the access units adjacent to one another at the boundary between said plurality of group 1 access units, said plurality of group 2 access units, and said prescribed number of group 3 access units share the invention for the decoding of the same common frames.
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Abstract
A stream combining apparatus is provided, comprising an input unit that receives the input of group access units and group access units from two streams that are generated by overlap transform; a decoder that generates group frames by decoding the group access units and that generates group frames by decoding the group access units; and a combining unit that uses group frames and group frames as a frame of reference for the access units, that decodes the frames, that performs selective mixing to generate mixed frames, that encodes said mixed frames, that generates a prescribed number of group access units, and that joins two streams, using a prescribed number of group access units as a joint such that the access units adjacent to each other on the boundary between the two streams and a prescribed number of group access units are stitched so that the information for decoding the same common frames is distributed.
31 Citations
9 Claims
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1. An audio stream combining apparatus that generates one audio stream by joining two audio streams composed of compressed data that is generated by overlap transform;
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wherein the access units that serve as units of decoding of said two audio streams are designated as group 1 access units and group 2 access units, respectively;
wherein the frames that are produced by decoding said two audio streams are designated as group 1 frames and group 2 frames, respectively; andwherein the access units that are produced by encoding the mixed frames that are generated by mixing said group 1 frames and group 2 frames are designated as group 3 access units;
whereinsaid audio stream combining apparatus comprises; an input unit that receives the input of group 1 access units and group 2 access units; a decoding unit that generates group 1 frames by decoding the group 1 access units that are input by said input unit and group 2 frames by decoding said group 2 access units; and a combining unit using the access units employed to decode the frames as a frame of reference, that selectively mixes the plurality of group 1 frames and the plurality of group 2 frames decoded by said decoding unit, that generates mixed frames, that generates prescribed number of group 3 access units by encoding said mixed frames, and that joins said plurality of group 1 frames and said plurality of group 2 frames, using said prescribed number of group 3 access units as a joint, such that the access units adjacent to one another at the boundary between said plurality of group 1 access units, said plurality of group 2 access units, and said prescribed number of group 3 access units share the invention for the decoding of the same common frames. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An audio stream combining method that generates one audio stream by joining two audio streams composed of compressed data that is generated by overlap transform;
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wherein the access units that serve as units of decoding of said two audio streams are designated as group 1 access units and group 2 access units, respectively;
wherein the frames that are produced by decoding said two audio streams are designated as group 1 frames and group 2 frames, respectively; and
wherein the access units that are produced by encoding the mixed frames that are generated by mixing said group 1 frames and said group 2 frames are designated as group 3 access units;
whereinsaid audio stream combining method comprises; an input step that inputs group 1 access units and group 2 access units; a decoding step that generates group 1 frames by decoding the group 1 access units that are input in said input step and that generates group 2 frames by decoding said group 2 access units; and a combining step that selectively mixes said plurality of frames decoded in said decoding step and a plurality of group 2 frames, using the access units employed to decode the frames as a frame of reference, and that generates a prescribed number of group 3 access units; and that joins said plurality of group 1 access units and said plurality of group 2 access units, such that, using said prescribed number of group 3 access units as a joint, the information for the decoding of the same common frames is shared by access units that are adjacent to one another across the boundary between said plurality of group 1 access units, said plurality of group 2 access units, and said prescribed number of group 3 access units.
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9. An audio stream combining program that causes the computer to execute the processing of generating one audio stream by joining two audio streams composed of compressed data that is generated by overlap transform;
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wherein the access units that serve as units of decoding of said two audio streams are designated as group 1 access units and group 2 access units, respectively;
wherein the frames that are produced by decoding said two audio streams are designated as group 1 frames and group 2 frames, respectively; and
wherein the access units that are produced by encoding the mixed frames that are generated by mixing said group 1 frames and group 2 frames are designated as group 3 access units;
whereinsaid audio stream combining program comprises; an input step that inputs group 1 access units and group 2 access units; a decoding step that generates group 1 frames by decoding the group 1 access units that are input in said input step and that generates group 2 frames by decoding said group 2 access units; and a combining step that selectively mixes said plurality of frames decoded in said decoding step and a plurality of group 2 frames, using the access units employed to decode the frames as a frame of reference, and that generates a prescribed number of group 3 access units; and that joins said plurality of group 1 access units and said plurality of group 2 access units, such that, using said prescribed number of group 3 access units as a joint, the information for the decoding of the same common frames is shared by access units that are adjacent to one another across the boundary between said plurality of group 1 access units, said plurality of group 2 access units, and said prescribed number of group 3 access units.
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Specification