Method and apparatuses for hierarchical transmission/reception in digital broadcast

• US 20090222855A1
• Filed: 05/24/2005
• Published: 09/03/2009
• Est. Priority Date: 05/24/2005
• Status: Abandoned Application

• Current Assignee: Nokia Corporation
• Original Assignee: Nokia Corporation
• Inventors: Vesma, Jussi, Auranen, Tommi, Hannuksela, Miska, Vare, Jani, Pekonen, Harri, Talmola, Pekka
• Application Number:
  US11/920,372
• Publication Number:
  US 20090222855A1
• Time in Patent Office: Days
• US Class Current: 725/39
• CPC Class Codes: H04H 20/28 Arrangements for simultaneous broadcast of plural pieces of information
• CPC Class Codes: H04L 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06

Abstract

In accordance with various aspects of the invention, there is being provided a method and apparatus for transmitting, and a method and apparatus for receiving a digital broadcast signal including a hierarchical modulation having a high priority stream and a low priority stream. The content to be received or transmitted in encoded into two stream so that a first stream is configured to be transmitted or received with the high priority stream, and a second stream to be transmitted/received with the low priority stream is configured to contain additional information for increasing the bitrate of the first stream.

Claims

1. An apparatus for transmitting a digital broadcast signal using a hierarchical modulation comprising a high priority stream and a low priority stream, the apparatus comprising:

at least one encoder for encoding service content to be transmitted into two streams so that

a first stream is configured to be transmitted with said high priority stream, and

a second stream to be transmitted with said low priority stream is configured to contain additional information.

2. An apparatus according to claim 1, wherein the first stream comprises a low quality stream and the second stream comprises a high quality stream so that a combination of the first and second streams provides an increased bitrate for the service content.

3. An apparatus according to claim 1, wherein the first stream and the second stream contains the same service content.

4. An apparatus according to claim 1, wherein the first stream comprises a base layer containing low resolution video.

5. An apparatus according to claim 1, wherein the second stream comprises an enhancement layer containing the additional information for high resolution video.

6. An apparatus according to claim 1 or 2, wherein the first stream and the second stream are transmitted at the same time.

7. An apparatus according to claim 1 or 2, wherein the first stream and the second stream are configured to be transmitted so that there is a phase shift between them.

8. An apparatus according to claim 1, wherein the digital broadcast signal comprises a mobile digital broadband broadcast signal such as DVB-H.

9. An apparatus for receiving a digital broadcast signal using a hierarchical modulation comprising a high priority stream and a low priority stream, the apparatus comprising:

at least one decoder for decoding service content received in two streams so that

a first stream is configured to be received with said high priority stream, and

a second stream to be received with said low priority stream is configured to contain additional information.

10. An apparatus according to claim 9, wherein said apparatus comprises a mobile receiver for receiving a DVB-H transmission.

11. A method for transmitting a digital broadcast signal using a hierarchical modulation comprising a high priority stream and a low priority stream, the method comprising:

encoding content to be transmitted into two streams so that

a first stream is configured to be transmitted with said high priority stream, and

a second stream to be transmitted with said low priority stream is configured to contain additional information.

12. A method for receiving a digital broadcast signal using a hierarchical modulation comprising a high priority stream and a low priority stream, the method comprising:

decoding content received in two streams so that

a first stream is configured to be received with said high priority stream, and

a second stream to be received with said low priority stream is configured to contain additional information.

13. An encoder for encoding a digital broadcast signal using a hierarchical modulation comprising a high priority stream and a low priority stream, the encoder comprising:

encoding means for encoding content to be transmitted into two streams so that

a first stream is configured to be transmitted with said high priority stream, and

a second stream to be transmitted with said low priority stream is configured to contain additional information.

14. A mobile terminal configured to process data packets that are transmitted as one or more transport stream packets containing packet identifiers, the terminal comprising:

a first memory for storing electronic service guide information,

a second memory for storing a service discovery data that links the service discovery data between low and high priority streams;

means for selecting a service from the electronic service guide for rendering;

a transport stream filter for filtering at least the service discovery data using packet identifiers;

wherein the filtering is based on a selection between a low priority stream and a high priority stream for receiving and rendering the service accordingly.