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US 5,845,043 AGranted
Transmission recording and reproduction of digital data and time information in transport packets using a compression ratio
AssigneeSony Corporation
InventorNaofumi Yanagihara
Life of this patent
Estimating the term…
Abstract
A data packet which contains time information is time compressed and the time information is extracted from the time compressed data packet. A system clock is synchronized with the extracted time information and is multiplied by a predetermined compression ratio to produce replacement time information which replaces the time information in the time compressed data packet. The time compressed data packet that now contains the replacement time information is modulated and transmitted or recorded.
Claims5
A data recording apparatus, comprising:
- a generator for generating a system clock;
- a receiver for receiving a data packet at a first transmission rate, said data packet including sync data at the beginning thereof;
- a sync eliminator for eliminating said sync data in said data packet;
- a time determining circuit for determining a reception time of said data packet as indicated by said system clock;
- a time stamper for adding time data identifying said reception time to said data packet in place of the eliminated sync data;
- a rate converter for converting said transmission rate of said data packet having said time data added thereto from said first transmission rate to a second transmission rate;
- and
- a recorder for recording said data packet including said time data at said second transmission rate on a record medium.
5 more elements
A method of recording data, comprising the steps of:
- generating a system clock;
- receiving a data packet at a first transmission rates, said data packet including sync data at the beginning thereof;
- eliminating said sync data in said data packet;
- determining a reception time of said data packet as indicated by said system clock;
- adding time data identifying said reception time to said data packet in place of the eliminated sync data;
- converting said transmission rate of said data packet having said time data added thereto from said first transmission rate to a second transmission rate;
- and
- recording said data packet including said time data at said second transmission rate on a record medium.
5 more elements
Dependencies are inferred from the claim text.