Recording medium, data recording apparatus and method, data playback apparatus and method, program, and recording medium

Abstract

The present invention enables audio data to be recorded or played back more easily. LPCM samples from an LPCM sample 301 - 1 of a first channel to an LPCM sample 304 - 1 of a fourth channel in audio data are combined in order to generate a GOLS 310 - 1 . An even number of GOLS are combined to generate an audio frame. Header information is added to the audio frame to generate an audio PES packet, which is multiplexed with a video PES packet and recorded onto a recording medium. As a result, the number of bits of the audio frame is an integral multiple of 32. This increases an affinity with a recording and playback apparatus.

1 . A recording medium having sampled audio data recorded in a data area thereof such that the audio data is readable by an information processing apparatus, wherein audio data is recorded in the data area, the audio data being generated by:
 generating a series of samples by arranging samples of the audio data which are sampled with the same timing for a plurality of channels in a predetermined order;   generating an audio frame by combining an even number of the series of the samples;   generating an element packet by adding header information indicating a channel configuration, the number of sample bits, and a sampling period to the audio frame; and   splitting the element packet into transmission packets composed of a predetermined number of bits.   
   
   
       2 . The recording medium according to  claim 1 ,
 wherein if the number of the channels is an odd number and when the series of the samples is to be generated,   a pseudo sample with the same number of bits as those of the samples and a predetermined pattern of the bits is inserted after the sample which is sampled for the last channel of the plurality of channels.   
   
   
       3 . The recording medium according to  claim 1 ,
 wherein the number of bits of the samples is 16, 20, or 24, and if the number of bits of the samples is 20, a predetermined pattern of 4 bits is added to the samples.   
   
   
       4 . The recording medium according to  claim 1 ,
 wherein the samples are samples of audio data which are sampled by a linear PCM method.   
   
   
       5 . The recording medium according to  claim 1 ,
 wherein the header information of the element packet further includes track head information.   
   
   
       6 . A data recording apparatus for recording sampled audio data or video data onto a recording medium readable by an information processing apparatus, comprising:
 data analyzing means for analyzing input audio data;   series-of-samples generating means for generating a series of samples by arranging samples of the audio data which are sampled with the same timing for a plurality of channels in a predetermined order on the basis of an analysis result by the analyzing means;   element-packet generating means for generating an element packet by generating an audio frame by combining an even number of the series of the samples generated by the series-of-samples generating means and by adding header information indicating a channel configuration, the number of sample bits, and a sampling period to the audio frame; and   transmission-packet generating means for generating a transmission packet by splitting the element packet generated by the element-packet generating means into transmission packets composed of a predetermined number of bits.   
   
   
       7 . The data recording apparatus according to  claim 6 ,
 wherein the series-of-samples generating means includes:   sample-inserting means for inserting a pseudo sample with the same number of bits as those of the samples and a predetermined pattern of the bits after the sample which is sampled for the last channel of the plurality of channels,   if the number of channels is determined to be an odd number by the analyzing means.   
   
   
       8 . The data recording apparatus according to  claim 6 , wherein the analyzing means includes sample-converting means for adding a predetermined pattern of 4 bits to the samples if the number of bits of the samples is 20. 
   
   
       9 . The data recording apparatus according to  claim 6 ,
 wherein the samples are samples of audio data which are sampled by a linear PCM method.   
   
   
       10 . The data recording apparatus according to  claim 6 ,
 wherein the element-packet generating means generates the element packet by storing track head information in the header information of the element packet.   
   
   
       11 . A data recording method by a data recording apparatus for recording sampled audio data or video data onto a recording medium readable by an information processing apparatus, the method comprising:
 a data-analyzing step of analyzing input audio data; a series-of-samples generating step of generating a series of samples by arranging samples of the audio data which are sampled with the same timing for a plurality of channels in a predetermined order on the basis of an analysis result in the analyzing step;   an element-packet generating step of generating an element packet by generating an audio frame by combining an even number of the series of the samples generated in the series-of-samples generating step and by adding header information indicating a channel configuration, the number of sample bits, and a sampling period to the audio frame; and   a transmission-packet generating step of generating a transmission packet by splitting the element packet generated in the element-packet generating step into transmission packets composed of a predetermined number of bits.   
   
   
       12 - 24 . (canceled)