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Variable rate transmission method, transmitter and receiver using the same

  • US 5,896,374 A
  • Filed: 10/22/1996
  • Issued: 04/20/1999
  • Est. Priority Date: 02/23/1995
  • Status: Expired due to Term
First Claim
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1. A variable rate transmission method which varies an average transmission rate by transmitting each frame of a fixed duration, said frame holding data of a variable length,wherein a transmitting side comprises the steps of:

  • calculating in each frame an error detecting code of data to be transmitted;

    transmitting said data to be transmitted and said error detecting code in said each frame at a predetermined fixed transmission rate; and

    pausing transmission in a blank of each frame, said blank being a part of said frame at which said data to be transmitted or said error detecting code is absent,wherein a receiving side comprises the steps of;

    receiving said each frame at said fixed transmission rate;

    detecting said error detecting code in said each frame; and

    recovering said transmitted data of the variable length in said each frame in response to a detecting result of said error detecting code,wherein said step of detecting said error detecting code sequentially divides received data in said each frame by predetermined data while shifting said received data bit by bit, and decides that said error detecting code is detected at a point at which said received data can be divided.

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