# US 8,543,230 B2 · Optimizing seek functionality in media content > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,543,230 B2 - Document ID: US8543230B2 - Status: Granted - Kind: B2 - Application number: 12/129,924 - Filed: 2008-05-30 - Published: 2009-12-03 - Granted: 2013-09-24 - Earliest claimed: 2008-05-30 - Assignees: Nokia Corporation - Applicants: Bryan Paul Honza - Inventors: Bryan Paul Honza - Web page: https://patentgrep.com/patent/US8543230B2 ## CPC - G11B 27/322: {used signal is digitally coded} - G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R) ## Abstract A system and method is provided for improving media playback and seek time for media files such as encoded audio data. As the media is decoded during playback, frame position information is stored in a frame table. This frame position information may be used for pause/resume functionality, and for seek operations. If a seek operation is to a position not stored in the frame table, the media data is parsed to produce frame position information that is added to the frame table until the seek location is reached. Frame table data may be stored in several different forms, including periodic intervals that may be selected based on the length of the media data, and also contemporaneous data useful for resuming from a pause command. ## Claims ### Claim 1 A method comprising: receiving encoded media data partitioned into frames; decoding, by a decoder module, at least a portion of the encoded media data, and outputting the decoded portion of the encoded media data; calculating frame position information for frames within the decoded portion of the encoded media data; storing the calculated frame position information in a frame table; upon receiving a command to seek to a particular location in the encoded media data, utilizing the calculated frame position information in the frame table to determine a position in the encoded media data to continue decoding the encoded media data, when the frame table does not have calculated frame position information for a particular location in the encoded media data, iteratively parsing, by a parser module, a sequentially next portion of the encoded media data until a frame position corresponding to the particular location is identified; calculating frame position information for frames within the parsed portion of the encoded media data; and storing the calculated frame position information for the frames within the parsed portion of the encoded media data in the frame table. ### Claim 2 (depends on 1) The method of claim 1 wherein storing the calculated frame position information in the frame table comprises storing frame position information based on a periodic time interval. ### Claim 3 (depends on 2) The method of claim 2 wherein the periodic time interval is selected based on a size value of the encoded media data. ### Claim 4 (depends on 1) The method of claim 1 wherein storing the calculated frame position information in a frame table comprises storing a predetermined number of calculated frame positions that are substantially contemporaneous with a present decoding position in the encoded media data. ### Claim 5 (depends on 1) The method of claim 1 wherein the encoded media data is variable bit rate encoded audio data. ### Claim 6 An apparatus comprising: a decoder, configured to decode encoded media data, the encoded media data partitioned into frames, wherein the decoder calculates frame position information for frames in the encoded media data while decoding and outputting the encoded media data; a frame table memory, configured to receive and store the calculated frame position information from the decoder, wherein upon receiving a command to seek to a particular location in the encoded media data, the frame table memory provides position information associated with the particular location in the encoded media data; and a parser, wherein when the frame table can not provide position information for a particular location in the encoded media data, the parser is configured to iteratively parse a sequentially next portion of the encoded media data until the particular location is parsed, to calculate frame position information for frames within the parsed portion of the encoded media data, and to provide the calculated frame position information to the frame table memory. ### Claim 7 (depends on 6) The apparatus of claim 6 wherein the frame table memory is configured to store the calculated frame position information based on a periodic time interval. ### Claim 8 (depends on 7) The apparatus of claim 7 wherein the periodic time interval is selected based on a size value of the encoded media data. ### Claim 9 (depends on 6) The apparatus of claim 6 wherein the frame table memory is configured to store a predetermined number of calculated frame positions that are substantially contemporaneous with a present decoding position in the encoded media data. ### Claim 10 (depends on 6) The apparatus of claim 6 wherein the encoded media data is variable bit rate encoded audio data. ### Claim 11 A non-transitory computer-readable medium, comprising computer readable instructions, that when provided to a processor cause the processor to perform: receiving encoded media data partitioned into frames; decoding, by a decoder module, at least a portion of the encoded media data, and outputting the decoded portion of the encoded media data; calculating frame position information for frames within the decoded portion of the encoded media data; storing the calculated frame position information in a frame table; upon receiving a command to seek to a particular location in the encoded media data, utilizing the calculated frame position information in the frame table to determine a position in the encoded media data to continue decoding the encoded media data, when the frame table does not have calculated frame position information for a particular location in the encoded media data, iteratively parsing, by a parser module, a sequentially next portion of the encoded media data until the particular location is parsed; calculating frame position information for frames within the parsed portion of the encoded media data; and storing the calculated frame position information for frames within the parsed portion of the encoded media data in the frame table. ### Claim 12 (depends on 11) The non-transitory computer-readable medium of claim 11, wherein storing the calculated frame position information in a frame table comprises storing frame position information based on a periodic time interval. ### Claim 13 (depends on 12) The non-transitory computer-readable medium of claim 12 wherein the periodic time interval is selected based on a size value of the encoded media data. ### Claim 14 (depends on 11) The non-transitory computer-readable medium of claim 11 wherein storing the calculated frame position information in a frame table comprises storing a predetermined number of calculated frame positions that are substantially contemporaneous with a present decoding position in the encoded media data. ### Claim 15 (depends on 11) The non-transitory computer-readable medium of claim 11 wherein the encoded media data is variable bit rate encoded audio data. ### Claim 16 An apparatus comprising: a processor; and a memory comprising executable instructions, that, when provided to the processor cause the processor to perform: receiving encoded media data partitioned into frames; decoding, by a decoder module, at least a portion of the encoded media data, and outputting the decoded portion of the encoded media data; calculating frame position information for frames within the decoded portion of the encoded media data; storing the calculated frame position information in a frame table based on a periodic time interval; and upon receiving a command to seek to a particular location in the encoded media data, utilizing the calculated frame position information in the frame table to determine a position in the encoded media data to continue decoding the encoded media data; wherein when the frame table does not have calculated frame position information for a particular location in the encoded media data, iteratively parsing, by a parser modue, a sequentially next portion of the encoded media data until the particular location is parsed, calculating frame position information for frames within the parsed portion of the encoded media data; and storing the calculated frame position information in the frame table. ### Claim 17 (depends on 16) The apparatus of claim 16 wherein storing the calculated frame position information in a frame table comprises storing a predetermined number of calculated frame positions that are substantially contemporaneous with a present decoding position in the encoded media data. ### Claim 18 (depends on 16) The apparatus of claim 16 wherein the apparatus is a mobile terminal. ### Claim 19 An apparatus comprising: decoding means for encoded media data partitioned into frames, and for calculating frame position information for frames in the encoded media data while decoding, and for outputting the encoded media data; memory means, for storing the calculated frame position information in a frame table; and for, upon receiving a command to seek to a particular location in the encoded media data, providing position information associated with the particular location in the encoded media data; and parsing means, for wherein when the memory means can not provide position information for a particular location in the encoded media data, iteratively parsing a sequentially next portion of the encoded media data until the particular location is parsed; and for calculating frame position information for frames within the parsed portion of the encoded media data.