Recording device, recording method, reproducing device, reproducing method, and recording/reproducing device

Abstract

A time code is added to moving image data obtained by imaging a state in which a person who writes a description is explaining while writing a description in a description portion and audio data corresponding to the moving image data to record the data in a recording unit. The moving image data is processed to determine a written portion written in the description portion, and index image data is generated to display each portion determined as the written portion as an index description, and the index image data is recorded in the recording portion. To the index image data, a value of the time code corresponding to description time is added as a timestamp, in association with each pixel constituting the index description.

1 . An information processing apparatus comprising:
 circuitry configured to   identify a written portion on a description portion in captured image data,   generate index image data as an index description based on the identified written portion, and   add a time code corresponding to a description time in the captured image data to the index image data as a timestamp.   
     
     
         2 . The information processing apparatus according to  claim 1 , wherein the circuitry is further configured to add the time code in association with pixels included in the index description. 
     
     
         3 . The information processing apparatus according to  claim 1 , wherein the circuitry is further configured to record the index image data in a recorder. 
     
     
         4 . The information processing apparatus according to  claim 1 , wherein to identify the written portion, the circuitry is configured to:
 extract a difference value between a current frame of the captured image date and a reference frame,   select groups of series of pixels having different values equal to or more than a threshold value, and   determine whether each of the selected groups includes the written portion.   
     
     
         5 . The information processing apparatus according to  claim 4 , wherein to determine whether each of the selected groups includes the written portion, the circuitry is configured to use at least one of a shape evaluation value, an extraction time value, and a stationary time evaluation value. 
     
     
         6 . The information processing apparatus according to  claim 5 , wherein the circuitry is further configured to determine the shape evaluation value based on a relationship between aspect ratios of a minimum square including a respective one of the selected groups and a maximum square included in the respective one of the selected groups. 
     
     
         7 . The information processing apparatus according to  claim 5 , wherein the circuitry is further configured to obtain the extraction time value based on a value of a difference from the reference frame image, in a pixel included in a respective one of the selected groups, over a current frame and a plurality of frames prior to the current frame. 
     
     
         8 . The information processing apparatus according to  claim 5 , wherein the circuitry is further configured to obtain the stationary time evaluation value based on a value of a difference from a frame image of a preceding frame, in a pixel of a respective one of the selected groups, over a current frame and a plurality of frames prior to the current frame. 
     
     
         9 . The information processing apparatus according to  claim 1 , wherein the circuitry is further configured to, when an erased state of the written portion is recognized more than a predetermined number of times, determine that the index image data is generated up to that point as one item of index image data and shift to a process of generating new index image data. 
     
     
         10 . The information processing apparatus according to  claim 1 , wherein the circuitry is further configured to:
 perform character recognition on the index description to recognize a word,   wherein the index image data includes data on the recognized word in association with each pixel included in the index description corresponding to the recognized word.   
     
     
         11 . An information processing method, comprising:
 identifying, with circuitry, a written portion on a description portion in captured image data,   generating, with the circuitry, index image data as an index description based on the identified written portion, and   adding, with the circuitry, a time code corresponding to a description time in the captured image data to the index image data as a timestamp.   
     
     
         12 . The information processing method according to  claim 11 , further comprising adding the time code in association with pixels included in the index description. 
     
     
         13 . The information processing method according to  claim 11 , further comprising recording the index image data in a recorder. 
     
     
         14 . The information processing method according to  claim 11 , further comprising:
 extracting a difference value between a current frame of the captured image date and a reference frame,   selecting groups of series of pixels having different values equal to or more than a threshold value, and   determining whether each of the selected groups includes the written portion.   
     
     
         15 . The information processing method according to  claim 14 , wherein to determine whether each of the selected groups includes the written portion at least one of a shape evaluation value, an extraction time value, and a stationary time evaluation value is used. 
     
     
         16 . The information processing method according to  claim 15 , further comprising determining the shape evaluation value based on a relationship between aspect ratios of a minimum square including a respective one of the selected groups and a maximum square included in the respective one of the selected groups. 
     
     
         17 . The information processing method according to  claim 15 , further comprising obtaining the extraction time value based on a value of a difference from the reference frame image, in a pixel included in a respective one of the selected groups, over a current frame and a plurality of frames prior to the current frame. 
     
     
         18 . The information processing method according to  claim 15 , further comprising obtaining the stationary time evaluation value based on a value of a difference from a frame image of a preceding frame, in a pixel of a respective one of the selected groups, over a current frame and a plurality of frames prior to the current frame. 
     
     
         19 . The information processing method according to  claim 11 , further comprising, when an erased state of the written portion is recognized more than a predetermined number of times, determining that the index image data is generated up to that point as one item of index image data and shifting to a process of generating new index image data. 
     
     
         20 . A non-transitory computer-readable medium encoded with computer-readable instructions that, when executed by a computer, cause the computer to perform a method comprising:
 identifying a written portion on a description portion in captured image data,   generating index image data as an index description based on the identified written portion, and   adding a time code corresponding to a description time in the captured image data to the index image data as a timestamp.