US 6,556,546 B1Granted

Multiplex data transmitting and receiving equipment

AssigneeMatsushita Electric Industrial Co., Ltd.

InventorsAkiyoshi Maeda, Hiroyuki Uenaka, Hidetoshi Takeda, Satoshi Kondo, Hiromu Kitaura, Yoshitaka Mitsui

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Abstract

In transmission and reception of signals in which audio data and management information used in playback are mingled, such as the data recorded in DVD or other recording media, this is to present means for separating the information into video and audio data and management information used in playback, so that the reception side can make use of various playback functions, such as a playback of original picture and sound information, a change of playback procedure, and a selection of playback information. At the transmission side, the data packet transforming means generates a first packet stream from transmission data. Consequently, the transmission packet generating means inserts packets generated from the playback management information by playback management information packet transforming means into the first packet stream at a specified rate, and generates a second packet stream. This is transmitted by using communication media as designated in IEEE1394 or the like. At the reception side, the signal acquired in the receiving means is separated into a packet stream of data and packets of playback management information in the packet identification means, so that the playback data is restored from the packet stream of data on the basis of the management information.

Claims3

Dependent claims

Multiplex data transmitting equipment comprising:

data packet transforming means for transforming input transmission data into a packet of transmission format suited to transmission in a band acquired in communication media;
playback management information packet transforming means for transforming playback management information for utilizing said transmission data into a packet of transmission format suited to transmission in said acquired band;
request signal receiving means for receiving a signal requesting an output of playback management information packet in other band than said acquired band, or receiving a signal requesting a change of rate of inserting the packets of said playback management information obtained in the playback management information packet transforming means into the first packet stream from the transmission data generated in the data packet transforming means;
transmission packet generating means for generating a second packet stream wherein packets of data and packets of playback management information are mingled by starting an insertion of packets of said playback management information obtained in said playback management information packet transforming means into the first packet stream from said transmission data generated in said data packet transforming means depending on the request from the request signal receiving means, or inserting the packets of said playback management information at a requested rate;
and
transmitting means for transmitting the second packet stream obtained in said transmission packet generating means in said acquired band.

3 more elements

Multiplex data receiving equipment comprising:

receiving means for receiving input reception data in a band acquired in communication media;
packet identification means for identifying and separating a packet stream of data and packet of playback management information from the packet stream of reception data received in said receiving means, and issuing individually;
central processing means for generating management information for managing playback of a packet stream of data in said reception data by using the playback management information packet issued from said packet identification means, and generating a signal for requesting a setting change of transmission relating to the playback management information packet in said reception data at the transmission side for issuing said reception data;
transmitting means for transmitting a signal requesting setting change of said reception data generated in said central processing means by using other band than said acquired band to the transmission side of said reception data;
data storage means for storing a packet stream of data issued from said packet identification means, and controlling the output by using the management information generated in said central processing means;
and
played-back data generating means for generating a played-back data stream from the output of said data storage means by using the management information generated in said central processing means.

4 more elements

Dependencies are inferred from the claim text.