Method for transmitting digitally coded analog signals

• US 4,611,323 A
• Filed: 05/23/1984
• Issued: 09/09/1986
• Est. Priority Date: 05/24/1983
• Status: Expired due to Fees

• Current Assignee: Ant Nachrichtentechnik GmbH, Koninklijke Philips N.V., Siemens AG
• Original Assignee: Ant Nachrichtentechnik GmbH, Koninklijke Philips N.V., Siemens AG
• Inventors: Hessenmuller, Horst
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): Scutch, III, Frank M.
• Application Number:
  US06/613,381
• Time in Patent Office: 839 Days
• Field of Search: 370/118, 370/79, 370/82, 370/83, 370/94, 370/60, 358/261
• US Class Current: 370/471
• CPC Class Codes: H04B 14/04 using pulse code modulation

Abstract

A method for transmitting digitally coded analog signals which are combined in coding blocks in a digital packet multiplex system permits transmission of coding blocks having a length which does not correspond to the normal useful packet length. In such an instance, packets having a different content are generated and information identifying such packets is transmitted to the receive side of the system in the form of a designated number of bits in the existing available transmission capacity of the beginning of the packet, so that the beginnings of the coding block can be recognized at the receive side.

Claims

1. A method for inserting digitally coded analog signals which are combined in coding blocks into a digital packet multiplex system in the form of packets of equal length, each packet having a packet head and a useful portion having a length which is optimized to first coding block length, comprising the steps of:

for coding blocks having a coding block length different than said first coding block length of said useful portion of said packet, generating a different plurality of coding blocks of a different coding block length such that a plurality of new useful portions of said optimized length is obtained, said plurality of new useful portions having a different format from said packet portions; and

communicating said different format of said new useful portions to said receiver with a plurality of bits available for transmission in the capacity of said packet head.

2. A method for transmitting digitally coded analog signals as claimed in claim 1 wherein the number of new useful portions of said coding block is a, and wherein said plurality of bits available in the transmission capacity of said packet head for communicating said format to said receiver is c, and wherein a=2^c.

3. A method for transmitting digitally coded analog signals as claimed in claim 2 wherein a next-highest value of c is selected for intermediate values of a in the equation a=2^c.

4. A method for transmitting digitally coded analog signals as claimed in claim 1 comprising the additional step of employing at least one additional bit in combination with said available bits in said transmission capacity of said packet head for identifying the content structure of coding blocks having said first coding block length.

5. A method for inserting a digitally coded analog signal into a time division multiplex signal, wherein each digitally coded analog signal consist of a series of coding blocks of predetermined fixed first data length and wherein said time division multiplex signal consist of a series of packets each including a packet head and a useful data portion of predetermined fixed second data length which is less than said first data length of said coding blocks, and wherein the overall data length of b coding blocks is equal to the data length of a data portions, a and b being integers, said method comprising the steps of:

partitioning successive groupings of b successive coding blocks into a modified coding blocks each having a length equal to said second data length;

generating a partitioning code for each modified coding block within each grouping; and

inserting each modified coding block into a packet and inserting the associated partitioning code in the corresponding packet head.

6. A method as claimed in claim 5 wherein said partitioning code consist of c bits, and wherein a=2^c.