Source: http://www.google.fr/patents/US8155153
Timestamp: 2013-06-20 11:08:13
Document Index: 487809826

Matched Legal Cases: ['Application No. 200680029407', 'Application No. 20068025138', 'application No. 06', 'Application No. 06769223', 'Application No. 2008', 'Application No. 2006', 'Application No. 2006', 'Application No. 2008', 'Application No. 06769225']

Brevet US8155153 - Apparatus and method of encoding and decoding audio signal - Google�BrevetsRecherche Images Maps Play YouTube Actualit�s Gmail Drive Plus » Recherche avanc�e dans les brevets | Historique Web | Connexion Recherche avanc�e dans les brevets BrevetsIn one embodiment, the method includes receiving audio frame data having at least first and second channel data. The first and second channel data include a plurality of blocks, where the blocks are classified by a block type. The first and second channel data is provided jointly if the first and second...http://www.google.fr/patents/US8155153?utm_source=gb-gplus-shareBrevet US8155153 - Apparatus and method of encoding and decoding audio signal Num�ro de publicationUS8155153 B2Type de publicationOctroi Num�ro de demande12/232,748 Date de publication10 avr. 2012 Date de d�p�t23 sept. 2008 Date de priorit�11 juil. 2005Autre r�f�rence de publicationUS8149876, US8149878, US8155152, US20090037184, US20090037185, US20090037190, US20090037191 Num�ro de publication12232748, 232748, US 8155153 B2, US 8155153B2, US-B2-8155153, US8155153 B2, US8155153B2 InventeursTilman Liebchen Cessionnaire d'origineLg Electronics Inc.Citations de brevets (99), Citations hors brevets (66), Classifications (23) Liens externes: USPTO, Cession USPTO, EspacenetApparatus and method of encoding and decoding audio signalUS 8155153 B2 R�sum� In one embodiment, the method includes receiving audio frame data having at least first and second channel data. The first and second channel data include a plurality of blocks, where the blocks are classified by a block type. The first and second channel data is provided jointly if the first and second channel data are paired with each other. The method further includes obtaining frame length information indicating a length of the audio frame data, and obtaining block information indicating the block type. The block information corresponds to the first and second channel data being common when the channel data are paired. The first and second channel data are lossless decoded based on the frame length information and the block information.
1. An audio medium player, comprising:
a demultiplexing part configured to receive an audio signal having at least first and second channel data, the first and second channel data including a plurality of blocks, the audio signal being transmitted on a digital audio signal, the first and second channel data having been independently subdivided into blocks if the first and second channel data are not paired with each other, the first and second channel data having been correspondingly subdivided into blocks such that lengths of the blocks into which the second channel data is subdivided correspond to lengths of the blocks into which the first channel data is subdivided if the first and second channel data are paired with each other;
a predictor configured to obtain frame length information indicating a length of audio frame data,
the predictor configured to obtain first subdivision information indicating a number of levels in the subdivision hierarchy,
the predictor configured to obtain block information indicating the subdivision of the first and second channel data into the blocks, the block information corresponding to the first and second channel data commonly when the first and second channel data are paired with each other,
the predictor configured to decode the first and second channel data based on the frame length information and the block information,
wherein the first and second channel data have been subdivided into blocks according to a subdivision hierarchy, the subdivision hierarchy has more than one level, and lengths of at least two of the plurality of blocks for each level are able to be different, wherein a length of the block information is based on the first subdivision information, and the first subdivision information indicates whether the subdivision hierarchy includes one of up to three levels, four levels, and five levels,
an error checking part configured to verify whether an error is present in the decoded first and second channel data;
a digital-to-analog converter configured to convert the decoded first and second channel data into an analog audio output signal; and
2. The audio medium player of claim 1, wherein the frame length information is obtained from a configuration information part of the audio signal.
3. The audio medium player of claim 1, wherein the first channel is a left channel and the second channel is a right channel.
4. The audio medium player of claim 1, wherein the block information is obtained from the audio frame data. Description
In one embodiment, the method includes receiving audio frame data having at least first and second channel data. The first and second channel data include a plurality of blocks, where the blocks are classified by a block type. The first and second channel data is provided jointly if the first and second channel data are paired with each other. The method further includes obtaining frame length information indicating a length of the audio frame data, and obtaining block information indicating the block type. The block information corresponds to the first and second channel data being common when the channel data are paired. The first and second channel data are lossless decoded based on the frame length information and the block information.
The bs_info field may include up to 4 bytes in accordance with the above-described embodiments. The mapping of bits with respect to levels 1 to 5 may be [(0)1223333 44444444 55555555 55555555]. The first bit may be reserved for indicating independent or synchronous block switching, which is described in more detail below in the Independent/Synchronous Block Switching section. FIGS. 5( a)-5(f) illustrate different block switching examples for a channel where level 3 block switching may take place. Therefore, in these examples, the minimum block length is NB=N/8, and the bs_info consists of one byte. Starting from the maximum block length NB=N, the bits of bs_info are set if a block is further subdivided. For example, in FIG. 5( a), there is no subdivision at all, thus �bs_info� is (0)000 0000. In FIG. 5( b), the frame is subdivided ((0)1 . . . ) and the second block of length N/2 is further split ((0)101 . . . ) into two blocks of length N/4; thus �bs_info� is (0)1010 0000. In FIG. 5( c), the frame is subdivided ((0)1 . . . ), and only the first block of length N/2 is further split ((0)110 . . . ) into two blocks of length N/4; thus �bs_info� is (0)1100 0000. In FIG. 5( d), the frame is subdivided ((0)1 . . . ), the first and second blocks of length N/2 is further split ((0)111 . . . ) into two blocks of length N/4, and only the second block of length N/4 is further split ((0)11100 . . . ) into two blocks of length N/8; thus �bs_info� is (0)111 0100.
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