Digital video recorder with background transcoder
First Claim
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1. A process for the recording, storage, and playback of video data, comprising the steps of:
- receiving broadcast video data;
encoding, using a first compression format, said video into a first encoded file;
storing said first encoded file on a storage device;
retrieving said first encoded file from the storage device;
re-encoding said first encoded file, using a second compression format, to create a second encoded file, wherein said second encoded file is smaller than said first encoded file;
storing said second encoded file on the storage device; and
decoding the second encoded file for playback.
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Abstract
A Digital Video Recorder is used to record broadcast television programs, store them on a hard disk, and replay them for later viewing. The programs are compressed in the MPEG-2 video compression format when they are first stored on the disk. A separate, second compression algorithm is later performed on the video files that are on the disk. Such transcoding typically occurs when the Digital Video Recorder is otherwise inactive and is used to apply more compression to the stored programs. This step results in a smaller file size for each video file and thereby permits more hours of video to be stored on a given hard disk.
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Citations
24 Claims
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1. A process for the recording, storage, and playback of video data, comprising the steps of:
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receiving broadcast video data;
encoding, using a first compression format, said video into a first encoded file;
storing said first encoded file on a storage device;
retrieving said first encoded file from the storage device;
re-encoding said first encoded file, using a second compression format, to create a second encoded file, wherein said second encoded file is smaller than said first encoded file;
storing said second encoded file on the storage device; and
decoding the second encoded file for playback. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A process for the recording, storage, and playback of video data, comprising the steps of:
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receiving digital video data encoded using a first compression format;
storing said received digital video data in a first encoded file on a storage device;
retrieving said first encoded file from the storage device;
re-encoding said first encoded file, using a second compression format, to create a second encoded file, wherein said second encoded file is smaller than said first encoded file;
storing said second encoded file on the storage device; and
decoding the second encoded file for playback. - View Dependent Claims (8, 9, 10, 11)
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12. A digital video recorder for recording, storing, and playing back video data, comprising:
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a video input device that receives broadcast video data;
a first encoder that encodes, using a first compression format, said video into a first encoded file;
a storage device that stores said first encoded file;
a second encoder that re-encodes said first encoded file, using a second compression format, to create a second encoded file, wherein said second encoded file is smaller than said first encoded file; and
a decoder that decodes the second encoded file for playback. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A digital video recorder for recording, storing, and playing back video data, comprising:
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a video input device that receives digital video data encoded using a first compression format;
a storage device that stores said received digital video data as a first encoded file;
an encoder that re-encodes said first encoded file, using a second compression format, to create a second encoded file, wherein said second encoded file is smaller than said first encoded file; and
a decoder that decodes the second encoded file for playback. - View Dependent Claims (21, 22, 23, 24)
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Specification