Transmission apparatus, transmission method, reception apparatus, receiving method, and program

A transmission apparatus comprising a transmitter that delivers a Layered Coding Transport (LCT) packet including a portion and an LCT header, the portion being data including part of a fragment, wherein

• the fragment includes:
• a movie fragment (moof);
• and
• a media data (mdat) including an mdat header and one or more sample groups,
• the moof includes BaseMediaDecodeTime representing a presentation time of a first sample of the mdat, and
• the LCT header includes:
• a sequence number representing a position of the fragment;
• a version representing a position of the part of the fragment in the fragment;
• a header extension portion including a Network Time Protocol (NTP) time representing the presentation time of the first sample of the mdat;
• sample count start information representing a position of a first sample of the part of the fragment from a first sample of the fragment;
• and
• a moof subset that is at least part of the moof.

A non-transitory computer-readable storage medium storing computer-readable instructions thereon, which, when executed by a computer, cause the computer to function as a transmitter that delivers a Layered Coding Transport (LCT) packet including a portion and an LCT header, the portion being data including part of a fragment, wherein

• the fragment includes:
• a movie fragment (moof);
• and
• a media data (mdat) including an mdat header and a sample group,
• the moof includes BaseMediaDecodeTime representing a presentation time of a first sample of the mdat, and
• the LCT header includes:
• a sequence number representing a position of the fragment;
• a version representing a position of the part of the fragment in the fragment;
• a header extension portion including a Network Time Protocol (NTP) time representing the presentation time of the first sample of the mdat;
• sample count start information representing a position of a first sample of the part of the fragment from a first sample of the fragment;
• and
• a moof subset that is at least part of the moof.

A reception apparatus comprising a receiver that receives a Layered Coding Transport (LCT) packet including a portion and an LCT header, the portion being data including part of a fragment, wherein

• the fragment includes:
• a movie fragment (moof);
• and
• a media data (mdat) including an mdat header and a sample group,
• the moof includes BaseMediaDecodeTime representing a presentation time of a first sample of the mdat, and
• the LCT header includes:
• a sequence number representing a position of the fragment;
• a version representing a position of the part of the fragment in the fragment;
• a header extension portion including a Network Time Protocol (NTP) time representing the presentation time of the first sample of the mdat;
• sample count start information representing a position of a first sample of the part of the fragment from a first sample of the fragment;
• and
• a moof subset that is at least part of the moof.

A receiving method comprising a step of receiving a Layered Coding Transport (LCT) packet including a portion and an LCT header, the portion being data including part of a fragment, wherein

• the fragment includes:
• a movie fragment (moof);
• and
• a media data (mdat) including an mdat header and a sample group,
• the moof includes BaseMediaDecodeTime representing a presentation time of a first sample of the mdat, and
• the LCT header includes:
• a sequence number representing a position of the fragment;
• a version representing a position of the part of the fragment in the fragment;
• a header extension portion including a Network Time Protocol (NTP) time representing the presentation time of the first sample of the mdat;
• sample count start information representing a position of a first sample of the part of the fragment from a first sample of the fragment;
• and
• a moof subset that is at least part of the moof.

A non-transitory computer-readable storage medium storing computer-readable instructions thereon, which, when executed by a computer, cause the computer to function as a receiver that receives a Layered Coding Transport (LCT) packet including a portion and an LCT header, the portion being data including part of a fragment, wherein

• the fragment includes:
• a movie fragment (moof);
• and
• a media data (mdat) including an mdat header and a sample group,
• the moof includes BaseMediaDecodeTime representing a presentation time of a first sample of the mdat, and
• the LCT header includes:
• a sequence number representing a position of the fragment;
• a version representing a position of the part of the fragment in the fragment;
• a header extension portion including a Network Time Protocol (NTP) time representing the presentation time of the first sample of the mdat;
• sample count start information representing a position of a first sample of the part of the fragment from a first sample of the fragment;
• and
• a moof subset that is at least part of the moof.