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Transmitting apparatus, transmitting method, receiving apparatus, receiving method, and transmitting and receiving system

a technology of transmitting apparatus and receiving method, which is applied in the direction of two-way working system, selective content distribution, transmission system, etc., can solve the problems of buffering, unrealistic data amount on the network, and inability to use data later, so as to reduce the time

Inactive Publication Date: 2012-06-14
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This approach enables instantaneous display of channels during changes, reducing user wait times and minimizing network failure impacts by buffering the auxiliary stream before switching to the main stream, thus enhancing user experience and system reliability.

Problems solved by technology

One cause is that, when a screen other than the I picture is received at the time of channel change, it is necessary to wait for the I picture.
However, since it is necessary to deliver a video stream in unicast every time the delivery request is received, this is unrealistic not only in terms of delivery costs but also in terms of a data amount on a network when the number of streams delivered is taken into consideration.
Another cause is that buffering is performed.
Even if the receiving apparatus immediately starts to receive the data, when it may be impossible to decode and display the data because an I picture or the like referred to by the data has already been transmitted and it is difficult to acquire the I picture or the like, it may be impossible to use the data later.

Method used

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  • Transmitting apparatus, transmitting method, receiving apparatus, receiving method, and transmitting and receiving system
  • Transmitting apparatus, transmitting method, receiving apparatus, receiving method, and transmitting and receiving system
  • Transmitting apparatus, transmitting method, receiving apparatus, receiving method, and transmitting and receiving system

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first embodiment

[0083]FIG. 5 is a block diagram of a structure of a system according to a first embodiment of the invention. In the block diagram, a streaming broadcast is delivered from a transmitting apparatus to a receiving apparatus through a network and displayed. The system shown in FIG. 5 includes a transmitting apparatus 11 that transmits a main stream and an auxiliary stream, a receiving apparatus 12 that receives the main stream and the auxiliary stream from the transmitting apparatus 11, and a network 13 through which the transmitting apparatus 11 and the receiving apparatus 12 are connected.

[0084]The transmitting apparatus 11 includes a main-stream storing unit 21, a bit-rate-reducing converting unit 22, an auxiliary-stream storing unit 23, a delivery control unit 24, and a network interface 25.

[0085]In the transmitting apparatus 11, data forming a main stream recorded in the main-stream storing unit 21 is inputted to the bit-rate-reducing converting unit 22. A result of reducing a bit ...

second embodiment

[0111]FIG. 9 is a diagram showing an example of a structure of another system according to a second embodiment of the invention. The system shown in FIG. 9 is different from the system shown in FIG. 5 in that, whereas the transmitting apparatus 11 transmits a main stream and an auxiliary stream in the system shown in FIG. 5, a main stream and an auxiliary stream are transmitted from different apparatuses in the system shown in FIG. 9.

[0112]Specifically, the system shown in FIG. 9 includes main-stream transmitting apparatuses 101-1 to 101-N and an auxiliary-stream transmitting apparatus 110. It is possible to apply the receiving apparatus 12 of the system shown in FIG. 5 to the system shown in FIG. 9. Thus, an example of a detailed structure of the receiving apparatus 12 is not shown in FIG. 9. The network 13 is also the same as the network 13 shown in FIG. 5.

[0113]The main-stream transmitting apparatus 101-1 includes a main-stream storing unit 102-1, a delivery control unit 103-1, a...

third embodiment

[0123]According to a third embodiment of the invention, the transmitting apparatus 11 that delivers both a main stream and an auxiliary stream as in the first embodiment and the main-stream transmitting apparatuses 101-1 to 101-N and the auxiliary-stream transmitting apparatus 110 that deliver main streams and an auxiliary stream independently from one another as in the second embodiment may be mixed.

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Abstract

A transmitting and receiving system includes a transmitting apparatus that delivers a main stream for performing a streaming broadcast and an auxiliary stream generated from the main stream and a receiving apparatus that receives the main stream and the auxiliary stream from the transmitting apparatus. The transmitting apparatus includes a main-stream storing unit, a bit-rate-reducing converting unit, an auxiliary-stream storing unit, and a delivery control unit. The receiving apparatus includes a main-stream-reception control unit, an auxiliary-stream-reception control unit, a data processing unit, and an inter-stream-error storing unit. When tuning operation by a user is received, the main-stream-reception control unit selects, from data of an auxiliary stream of a tuned broadcast, data at such a time that the auxiliary stream is possible to be switched to a main stream without shift of scenes when the auxiliary stream is switched to the main stream later and supplies the data to the data processing unit.

Description

CROSS-REFERENCES TO RELATED APPLICATIONS[0001]The present invention contains subject matter related to Japanese Patent Application JP 2006-034762 filed in the Japanese Patent. Office on Feb. 13, 2006, the entire contents of which being incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a transmitting apparatus, a transmitting method, a receiving apparatus, a receiving method, and a transmitting and receiving system, and, more particularly to a stream transmitting apparatus, a stream transmitting method, a stream receiving apparatus, a stream receiving method, and a stream transmitting and receiving system for performing program change (tuning operation) at high speed when a streaming broadcast is received.[0004]2. Description of the Related Art[0005]The terrestrial digital broadcasting has started in Japan. As measures for areas having difficulty in viewing programs aiming at spread and promotion of the t...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04N7/01H04N7/26H04N7/173H04N21/462
CPCH04N21/23406H04N21/23424H04N21/235H04N21/44016H04N21/4384H04N21/44004H04N21/435H04N21/431H04N7/24
Inventor MATSUBAYASHI, KEI
Owner SONY CORP