# US 7,609,301 B2 · Motion image recording device with compression ratio control > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,609,301 B2 - Document ID: US7609301B2 - Status: Granted - Kind: B2 - Application number: 10/526,900 - Filed: 2003-09-03 - Published: 2006-07-13 - Granted: 2009-10-27 - Earliest claimed: 2002-09-10 - Assignees: Sanyo Electric Co., Ltd. - Inventors: Junya Kaku - Web page: https://patentgrep.com/patent/US7609301B2 ## CPC - H04N 9/7921: {for more than one processing mode} - H04N 23/69: Control of means for changing angle of the field of view, e.g. optical zoom objectives or electronic zooming - H04N 5/772: {the recording apparatus and the television camera being placed in the same enclosure} - H04N 5/781: on disks or drums - H04N 9/8042: {involving data reduction} - H04N 9/8047: {using transform coding} - H04N 9/8063: {using time division multiplex of the PCM audio and PCM video signals} - H04N 9/8205: {involving the multiplexing of an additional signal and the colour video signal} - H04N 9/8227: {the additional signal being at least another television signal} - H04N 2009/8084: {using transform coding} - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A digital video camera (10) includes a CPU (52) mounting a multitasking OS. A plurality of frames of YUV data forming a motion image are recorded in a recording medium (50) in a compressed manner under the control of the CPU 52. Here, a plurality of tasks to be executed by the CPU (52) includes an imaging processing task in relation to a compression process of the plurality frames of the YUV data and a BG processing task in relation to a recording process of a plurality of frames of JPEG data. Furthermore, the imaging processing task includes a determining process for periodically determining a recording processing speed of the JPEG data and a changing process for changing a compression ratio of the YUV data on the basis of the determination result. ## Claims ### Claim 1 A motion image recording apparatus which comprises a processor mounting a multitasking OS, and records a plurality of screens of image data forming a motion image signal in a compressed manner in a recording medium, wherein a plurality of tasks to be executed by said processor includes a first task in relation to a compression process of image data, and a second task in relation to a recording process of compressed image data, said first task includes an adding process for adding, to a predetermined parameter value, a value corresponding to a size of the compressed image data equivalent to a first number of screens, every time that image data corresponding to said first number of screens is compressed, said second task includes a subtracting process for subtracting, from said predetermined parameter value, a value corresponding to a size of the compressed image data equivalent to a second number of screens, every time that compressed image data corresponding to said second number of screens is recorded, and said first task includes a changing process for changing a compression ratio of the image data such that said compression ratio becomes higher as said predetermined parameter value becomes larger; wherein, when another task is executed, the second task is interrupted each time that a transmission by the defined amount is completed. ### Claim 2 (depends on 1) A motion image recording apparatus according to claim 1, wherein said second task further includes a transmission process for transmitting the compressed image data by a defined amount to a recording medium. ### Claim 3 (depends on 1) A motion image recording apparatus according to claim 1, further comprising a fetching means for fetching said plurality of screens of image data according to a fetching condition, wherein said plurality of tasks include a third task in relation to an adjustment of said fetching condition. ### Claim 4 (depends on 3) A motion image recording apparatus according to claim 3, wherein said fetching means includes an imaging means for imaging an object, and said fetching condition includes an imaging condition of said imaging means. ### Claim 5 (depends on 1) A motion image recording apparatus according to claim 1, wherein said predetermined parameter value is an accumulated value of a size of the compressed image data. ### Claim 6 (depends on 1) A motion picture recording apparatus according to claim 1, wherein said predetermined parameter value indicates a size of image data that has been compressed, but has not yet been recorded. ### Claim 7 A motion image recording apparatus with compression ratio control, comprising: a fetcher for fetching a plurality of screens of image data forming a motion image; a compressor for compressing the image data of each of screens fetched by said fetcher with reference to a target size; a recorder for recording compressed image date generated by said compressor in a recording medium; a first detector for detecting a first size value indicative of a total size of the compressed image data corresponding to a newest predetermined number of screens; a second detector for detecting a second size value indicative of a total size of the compressed image data that has already been created by said compressor and has not yet been recorded by said recorder; a divider for dividing a difference value obtained by subtracting said second size value from said first size value by said predetermined number to obtain a divided value; and a setter for setting the divided value as said target size when the divided value obtained by said divider falls between a first preset value and a second preset value that is larger than the first preset Value, setting said first preset value as said target size when the divided value obtained by said divider is below said first preset value, and setting said second preset value as said target size when the divided value obtained by said divider is above the second preset value. ### Claim 8 (depends on 7) A motion image recording apparatus according to claim 7, comprising: a bus to be utilized for transmitting the image data and the compressed image data; a memory for storing the image data and the compressed image data that are transmitted through said bus; a zooming means for performing an electric zooming process on the image data; and a selecting means for arbitrarily selecting a zooming manner of said zooming means, wherein said zooming means, when an enlargement zooming is selected by said selecting means, extracts a part of the image data by use of said memory, and performs the enlargement zooming on the extracted motion image data. ### Claim 9 (depends on 7) A motion picture recording apparatus according to claim 7, wherein the compressor compresses the image data to a size approximately equal to the target size.