Digital audio broadcast receiver having circuitry for retrieving embedded data and for supplying the retrieved data to peripheral devices

• US 5,796,785 A
• Filed: 10/01/1996
• Issued: 08/18/1998
• Est. Priority Date: 10/04/1995
• Status: Expired due to Term

• Current Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Original Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Inventors: Spiero, Richard C.
• Primary Examiner(s): Pham, Chi H.
• Assistant Examiner(s): LUTHER, WILLIAM A
• Application Number:
  US08/724,389
• Time in Patent Office: 686 Days
• Field of Search: 375/316, 375/340, 375/259, 375/342, 375/346, 375/377, 364/710.1, 364/715.03
• US Class Current: 375/316
• CPC Class Codes: H04H 2201/20 digital audio broadcasting [DAB]
• CPC Class Codes: H04H 40/27 specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95

Abstract

A receiver and a method for adding a sequence, embedded in a digital sequence of data together with another sequence, separate of the other sequence to at least a part of the digital sequence of data. An example of such a sequence is the Program Associated Data (PAD) in a DAB digital sequence of data, this PAD being embedded in audio frames together with audio data. The DAB digital sequence of data is converted into a sequence according to the IEC958 format, wherein the retrieved PAD is inserted into the User Data channel in the IEC958 frames. This allows an easy retrieval of the PAD from the digital sequence of data, without the need for analyzing audio frames and retrieving the PAD therefrom.

Claims

1. A receiver for receiving a digital transmission signal, said digital transmission signal comprising a channel encoded digital sequence of data, said digital sequence of data comprising a plurality of sequences of different data types, at least one sequence out of said plurality of sequences of different data types being embedded in said digital sequence of data together with at least one other sequence out of said plurality of sequences of different data types, the receiver comprising:

means for channel decoding the received digital transmission signal forming said digital sequence of data;

means for retrieving said at least one sequence out of said plurality of sequences of different data types which had been embedded in the digital sequence of data; and

means for supplying at least a part of the digital sequence of data from the received and channel decoded digital transmission signal, characterized in that said supplying means is arranged for adding the retrieved at least one sequence separately from the at least one other embedded sequence to the at least a part of the digital sequence of data.

2. The receiver of claim 1, characterized in that the supplying means also adds a data type identifier to the retrieved at least one sequence for identifying the data type in the at least one sequence.

3. The receiver of claim 1, characterized in that the supplying means also adds a length indicator to the retrieved at least one sequence for identifying a length of the at least one sequence.

4. The receiver of claim 1, characterized in that the digital transmission signal is a Digital Audio Broadcast signal, and in that the at least one sequence is Program Associated Data.

5. A method for supplying at least a part of a digital sequence of data, said digital sequence of data comprising a plurality of sequences of different data types, at least one sequence out of said plurality of sequences of different data types being embedded in the digital sequence of data together with at least one other sequence out of said plurality of sequences of different data types, characterized in that the method comprises the steps:

retrieving said at least one sequence out of said plurality of sequences of different data types which had been embedded in said digital sequence of data; and

inserting the retrieved at least one sequence separate from the at least one other embedded sequence into the at least part of the digital sequence of data.

6. The method of claim 5, characterized in that a data type identifier is added to the retrieved at least one sequence for identifying a data type in the retrieved at least one sequence.

7. The method of claim 5, characterized in that a length indicator is added to the retrieved at least one sequence for identifying a length of the retrieved at least one sequence.

8. The method of claim 5, characterized in that the digital transmission signal is a Digital Audio Broadcast signal and in that the at least one sequence is Program Associated Data.