Visual communication terminal apparatus for performing multiplex transmission of image and audio signals

• US 5,539,811 A
• Filed: 04/12/1994
• Issued: 07/23/1996
• Est. Priority Date: 04/13/1993
• Status: Expired due to Fees

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Nakamura, Junji, Nishimura, Toshihiro
• Primary Examiner(s): Chan, Wing F.
• Application Number:
  US08/226,591
• Time in Patent Office: 833 Days
• Field of Search: 379/93, 379/94, 379/96-100, 348/14-17, 370/110.1, 370/94.1
• US Class Current: 379/93.14
• CPC Class Codes: H04N 7/147 Communication arrangements, e.g. identifying the communication as a video-communication, intermediate storage of the signals selecting H04Q
• CPC Class Codes: H04N 7/148 Interfacing a video terminal to a particular transmission medium, e.g. ISDN
• CPC Class Codes: H04Q 11/0428 Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
• CPC Class Codes: H04Q 2213/13034 A/D conversion, code compression/expansion
• CPC Class Codes: H04Q 2213/1307 Call setup
• CPC Class Codes: H04Q 2213/13097 Numbering, addressing
• CPC Class Codes: H04Q 2213/13204 Protocols
• CPC Class Codes: H04Q 2213/13208 Inverse multiplexing, channel bonding, e.g. TSSI aspects
• CPC Class Codes: H04Q 2213/13209 ISDN
• CPC Class Codes: H04Q 2213/13216 Code signals, frame structure
• CPC Class Codes: H04Q 2213/13292 Time division multiplexing, TDM
• CPC Class Codes: H04Q 2213/13337 Picturephone, videotelephony
• CPC Class Codes: H04Q 2213/13367 Hierarchical multiplexing, add-drop multiplexing

Abstract

A visual communication is performed between a calling party and a called party through a plurality of channels. After the parties are connected through a first channel, an available telephone number of a second channel stored in a BAS control portion is read to a TNI control portion on each of the parties, and the TNI control portions of the parties exchange the available telephone numbers. Thereafter, when an incoming call having a telephone number is received through the second channel by a call control processing portion of the called party, the telephone number of the call is compared with the available telephone number of the second channel by an ICJ portion. To perform correct visual communication between parties, in cases where the telephone number of the call agrees with the available telephone number, the call is established by the call control processing portion, and image and audio signals are transmitted from the calling party to the called party through codec portions, multiplexing/demultiplexing portions and the first and second channels to perform a visual communication. In contrast, in cases where the telephone number of the call does not agree with the available telephone number, the second channel is released.

Claims

1. A visual communication terminal apparatus for communicating between a first calling party and a called party connected through a first channel, comprising at each called and calling party:

network interface means for transmitting at a first calling party, to the called party through the first channel, a piece of particular identifying information of a second channel differing from the first channel;

for receiving, at the called party, the piece of particular identifying information of the second channel transmitted from the first calling party through the first channel;

for transmitting, at the first calling party or at a second calling party, a call to the called party through the second channel; and

for receiving, at the called party, the call transmitted from the first calling party or from the second calling party through the second channel;

identifying information controlling means for preparing, at the first calling party, the piece of particular identifying information transmitted to the called party through the network interface means of the first calling party and the first channel;

for preparing, at the second calling party, a piece of general identifying information of the second channel for transmission to the called party through the network interface means of the second calling party; and

for storing, at the called party, the piece of particular identifying information of the second channel transmitted from the first calling party to the called party through the network interface means of the first calling party and the first channel;

call control processing means for preparing, at the first calling party or at the second calling party, the call transmitted to the called party;

for adding, at the first calling party, the piece of particular identifying information of the second channel to the call in cases where the call is prepared at the first calling party;

for adding, at the second calling party, the piece of general identifying information of the second channel to the call in cases where the call is prepared at the second calling party;

for receiving, at the called party, the call prepared at the first calling party or at the second calling party through the second channel and the network interface means of the called party;

for disconnecting the call in cases where a release of the second channel is notified; and

for establishing the call in cases where an establishment of the call is notified;

incoming-call judging means for comparing, at the called party, a received piece of identifying information of the second channel added to the call received by the call control processing means of the called party with the particular identifying information stored in the identifying information controlling means of the called party; and

for judging, at the called party, whether or not the received piece of identifying information received by the call control processing means of the called party agrees with the particular identifying information stored in the identifying information controlling means of the called party;

incoming-call judgement controlling means for notifying the call control processing means of the called party of the release of the second channel in cases where the incoming-call judging means of the called party judges that the received piece of identifying information does not agree with the particular identifying information stored in the identifying information controlling means of the called party; and

for notifying the call control processing means of the called party of the establishment of the call at the called party in cases where the incoming call judging means judges that the received piece of identifying information agrees with the particular identifying information stored in the identifying information controlling means of the called party; and

information communicating means for transmitting, at the first calling party, one or more pieces of visual information to the called party through the network interface means and the first and second channels in cases where the call control processing means establishes the call transmitted through the second channel and

for receiving, at the called party, the visual information from the first calling party through the network interface means and the first and second channels to perform a visual communication between the first calling party and the called party.

2. A visual communication terminal apparatus according to claim 1, wherein the information communicating means comprises:

codec means for coding, at the first calling party, an image signal and an audio signal indicating the visual information to produce a coded image signal and a coded audio signal, and

for decoding, at the called party, the coded image signal and the coded audio signal to reproduce the image signal and the audio signal; and

multiplexing/demultiplexing means for multiplexing the coded image signal and the coded audio signal produced by the codec means at the first calling party to transmit multiplexed coded image and audio signals to the called party through the network interface means and the first and second channels, and

for demultiplexing, at the called party, the multiplexed coded image and audio signals transmitted from the first calling party through the network interface means and the first and second channels, the demultiplexed coded image and audio signals being decoded by the codec means.

3. A visual communication terminal apparatus according to claim 1, wherein the identifying information controlling means comprises:

bit-rate allocation signal controlling means for storing, at both the first calling party and the called party, a plurality of pieces of identifying information of a plurality of available channels in a bit-rate allocation signal code area in bit-rate allocation signal code form; and

identifying information interchange controlling means for reading, at the first calling party, a piece of identifying information of the second channel selected from among the available channels from the bit-rate allocation signal controlling means as the particular identifying information of the second channel;

for reading, at the called party, a piece of called-identifying information of the second channel selected from among the available channels from the bit-rate allocation signal controlling means;

for storing, at the called party, the particular identifying information transmitted from the first calling party to the called party through the network interface means and the first channel; and

for storing, at the first calling party, the called-identifying information transmitted from the called party to the first calling party through the network interface means and the first channel.

4. A visual communication terminal apparatus according to claim 1 wherein the identifying information controlling means comprises:

bit-rate allocation signal controlling means for storing, at both the first calling party and the called party, a plurality of pieces of identifying information of a plurality of available channels and the number of available channels in a bit-rate allocation signal code area in bit-rate allocation signal code form; and

identifying information interchange controlling means for reading, at the first calling party, a piece of identifying information of the second channel selected from among the available channels from the bit-rate allocation signal controlling means as the particular identifying information of the second channel;

for reading, at the called party, a piece of called-identifying information of the second channel selected from among the available channels from the bit-rate allocation signal controlling means;

for storing, at the called party, the particular identifying information transmitted from the first calling party to the called party through the network interface means and the first channel; and

for storing, at the first calling party, the called-identifying information transmitted from the called party to the first calling party through the network interface means and the first channel.

5. A visual communication terminal apparatus according to claim 1 wherein the particular identifying information prepared by the identifying information controlling means at the first calling party is a particular telephone number of the second channel.

6. A visual communication terminal apparatus for communicating between a first calling party and a called party connected through a first channel, comprising at each called and calling party:

network interface means for transmitting at a first calling party, to the called party through the first channel, a piece of particular identifying information of a second channel differing from the first channel;

for receiving, at the called party, the piece of particular identifying information of the second channel transmitted from the first calling party through the first channel;

for transmitting, at the called party, a particular telephone number of the second channel to the first calling party through the first channel;

for receiving, at the first calling party, the particular telephone number of the second channel transmitted from the called party through the first channel;

for transmitting, at the first calling party or at a second calling party, a call to the called party according to the particular telephone number of the second channel through the second channel; and

for receiving, at the called party, the call transmitted from the first calling party or the second calling party through the second channel;

identifying information controlling means for preparing, at the called party, the particular telephone number transmitted to the first calling party through the network interface means;

for preparing, at the first calling party, the piece of particular identifying information transmitted to the called party through the network interface means of the first calling party and the first channel;

for preparing, at the second calling party, a piece of general identifying information of the second channel for transmission to the called party through the network interface means of the second calling party;

for storing, at the first calling party, the particular telephone number transmitted from the called party to the first calling party through the network interface means and the first channel; and

for storing, at the called party, the piece of particular identifying information transmitted from the first calling party to the called party through the network interface means of the first calling party and the first channel;

call control processing means for preparing, at the first calling party or at the second calling party, the call transmitted to the called party;

for adding, at the first calling party, the piece of particular identifying information of the second channel to the call in cases where the call is prepared at the first calling party;

for adding, at the second calling party, the piece of general identifying information of the second channel to the call in cases where the call is prepared at the second calling party;

for receiving, at the called party, the call prepared at the first calling party or at the second calling party through the second channel and the network interface means of the called party;

for disconnecting the call in cases where a release of the second channel is notified; and

for establishing the call in cases where an establishment of the call is notified;

incoming-call judging means for comparing, at the called party, a received piece of identifying information of the call received by the call control processing means of the called party with the particular identifying information stored in the identifying information controlling means of the called party; and

for judging, at the called party, whether or not the received piece of identifying information of the call received by the call control processing means of the called party agrees with the particular identifying information stored in the identifying information controlling means of the called party;

incoming-call judgement controlling means for notifying the call control processing means of the called party of the release of the second channel in cases where the incoming-call judging means of the called party judges that the received piece of identifying information of the call received by the call control processing means of the called party does not agree with the particular identifying information stored in the identifying information controlling means of the called party; and

for notifying the call control processing means of the called party of the establishment of the call at the called party in cases where the incoming call judging means judges that the received piece of identifying information of the call received by the call control processing means of the called party agrees with the particular identifying information stored in the identifying information controlling means of the called party; and

information communicating means for transmitting, at the first calling party, one or more pieces of visual information to the called party through the network interface means and the first and second channels in cases where the call control processing means establishes the call transmitted through the second channel and

for receiving, at the called party, the visual information from the first calling party through the network interface means and the first and second channels to perform a visual communication between the first calling party and the called party.

7. A visual communication terminal apparatus according to claim 6, wherein the information communicating means comprises:

codec means for coding, at the first calling party, an image signal and an audio signal indicating the visual information to produce a coded image signal and a coded audio signal, and

for decoding, at the called party, the coded image signal and the coded audio signal to reproduce the image signal and the audio signal; and

multiplexing/demultiplexing means for multiplexing the coded image signal and the coded audio signal produced by the codec means at the first calling party to transmit multiplexed coded image and audio signals to the called party through the network interface means and the first and second channels, and

for demultiplexing, at the called party, the multiplexed coded image and audio signals transmitted from the first calling party through the network interface means and the first and second channels, the demultiplexed coded image and audio signals being decoded by the codec means.

8. A visual communication terminal apparatus according to claim 6, wherein the identifying information controlling means comprises:

bit-rate allocation signal controlling means for storing, at the first calling party, a plurality of pieces of identifying information of a plurality of available channels in a bit-rate allocation signal code area in bit-rate allocation signal code form;

for storing, at the called party, a plurality of telephone numbers of the available channels in a bit-rate allocation signal code area in bit-rate allocation signal code form; and

identifying information interchange controlling means for reading, at the first calling party, a piece of identifying information of the second channel selected from among the available channels from the bit-rate allocation signal controlling means as the particular identifying information of the second channel;

for reading, at the called party, a telephone number of the second channel selected from among the available channels from the bit-rate allocation signal controlling means as the particular telephone number of the second channel;

for storing, at the called party, the particular identifying information transmitted from the first calling party to the called party through the network interface means and the first channel; and

for storing, at the first calling party, the particular telephone number transmitted from the called party to the first calling party through the network interface means and the first channel.

9. A visual communication terminal apparatus according to claim 6 wherein the identifying information controlling means comprises:

bit-rate allocation signal controlling means for storing, at the first calling party, a plurality of pieces of identifying information of a plurality of available channels and the number of identifying information in a bit-rate allocation signal code area in bit-rate allocation signal code form;

for storing, at the called party, a plurality of telephone numbers of the available channels and the number of telephone numbers in a bit-rate allocation signal code area in bit-rate allocation signal code form; and

identifying information interchange controlling means for reading, at the first calling party, a piece of identifying information of the second channel selected from among the available channels from the bit-rate allocation signal controlling means as the particular identifying information of the second channel;

for reading, at the called party, a telephone number of the second channel selected from among the available channels from the bit-rate allocation signal controlling means as the particular telephone number of the second channel;

for storing, at the called party, the particular identifying information transmitted from the first calling party to the called party through the network interface means and the first channel; and

for storing, at the first calling party, the particular telephone number transmitted from the called party to the first calling party through the network interface means and the first channel.

10. A visual communication terminal apparatus according to claim 6 wherein the particular identifying information prepared by the identifying information controlling means at the first calling party is a particular calling-telephone number of the second channel.

11. A visual communication terminal apparatus for communicating between a first calling party and a called party connected through a first channel, comprising at each called and calling party:

network interface means for transmitting, at the first calling party or at a second calling party, a call to the called party through a second channel differing from the first channel; and

for receiving, at the called party, the call transmitted from the first calling party or the second calling party through the second channel;

call control processing means for preparing, at the first calling party or at the second calling party, the call transmitted to the called party;

for receiving, at the called party, the call prepared at the first calling party or at the second calling party through the second channel and the network interface means of the called party;

for disconnecting the call in cases where a release of the second channel is notified; and

for establishing the call in cases where an establishment of the call is notified;

incoming-call judging means for judging, at the called party, whether or not the call received by the call control processing means of the called party is prepared by the first calling party;

incoming-call judgement controlling means for notifying the call control processing means of the called party of the release of the second channel in cases where the incoming-call judging means of the called party judges that the call received by the call control processing means of the called party is not prepared by the first calling party; and

for notifying the call control processing means of the called party of the establishment of the call at the called party in cases where the incoming call judging means judges that the call received by the call control processing means of the called party is prepared by the first calling party; and

information communicating means for transmitting, at the first calling party, one or more pieces of visual information to the called party through the network interface means and the first and second channels in cases where the call control processing means establishes the call transmitted through the second channel and

for receiving, at the called party, the visual information from the first calling party through the network interface means and the first and second channels to perform a visual communication between the first calling party and the called party.

12. A visual communication terminal apparatus according to claim 11, wherein the information communicating means comprises:

codec means for coding, at the first calling party, an image signal and an audio signal indicating the visual information to produce a coded image signal and a coded audio signal, and

for decoding, at the called party, the coded image signal and the coded audio signal to reproduce the image signal and the audio signal; and

multiplexing/demultiplexing means for multiplexing the coded image signal and the coded audio signal produced by the codec means at the first calling party to transmit multiplexed coded image and audio signals to the called party through the network interface means and the first and second channels, and

for demultiplexing, at the called party, the multiplexed coded image and audio signals transmitted from the first calling party through the network interface means and the first and second channels, the demultiplexed coded image and audio signals being decoded by the codec means.

13. A visual communication terminal apparatus for communicating between a calling party and a called party connected thereto through a first channel comprising, at each of said called party and said calling party:

network interface means;

call control processing means;

incoming-call judging means;

incoming-call judgement controlling means; and

information communicating means, wherein;

said network interface means of said calling party operates for transmitting a further call to said called party connected thereto, through a second channel differing from said first channel; and

said network interface means of said called party operates for receiving, through said second channel, the further call from the calling party;

said call control processing means of said called party operates for disconnecting a received call in response to notification to release said second channel; and

said call control processing means of said called party further operates for establishing a received call through said second channel in response to notification to establish the call;

said incoming-call judging means of said called party operates for judging whether or not a call received by said network interface means of said called party through said second channel is said further call transmitted by said calling party;

said incoming-call judgement controlling means of said called party operates for notifying said call control processing means of said called party to release said second channel in response to judgment by said incoming-call judging means of said called party that the call received by said network interface means of said called party through said second channel is not said further call transmitted by said calling party; and

said incoming-call judgement controlling means of said called party further operates for notifying said call control processing means of said called party to establish the received call on said second channel in response to judgment by said incoming call judging means of said called party that the call received by said network interface means of said called party through said second channel is said further call transmitted by said calling party;

said information communicating means of said calling party operates for transmitting one or more pieces of visual information to said called party through said network interface means of said calling party and through said first and second channels in response to establishment of the call through said second channel by said call control processing means of said called party; and

said information communicating means of said calling party operates for receiving said one or more pieces of visual information from said calling party through said network interface means of said called party and through said first and second channels to perform a visual communication between said calling party and the called party.

14. A visual communication terminal apparatus according to claim 13, wherein:

said network interface means of said calling party further operates for transmitting to said called party, through said first channel, a piece of particular identifying information of said second channel;

said network interface means of said called party operates for receiving the piece of particular identifying information of said second channel transmitted from said calling party through said first channel; and

further comprising, at each called and calling party, identifying information controlling means;

said identifying information controlling means of said called party operating for storing, at said called party, the piece of particular identifying information of said second channel transmitted from said calling party to said called party through said first channel;

wherein said incoming-call judging means of said called party judges whether or not a call received by the call control processing means of the called party is the further call transmitted from said calling party by comparing a received piece of identifying information of the second channel in the received call with the piece of particular identifying information of the second channel stored in said identifying information controlling means of said called party; and

by judging that the received call is the further call transmitted by said calling party when the received piece of identifying information included in the received call agrees with the piece of particular identifying information stored in said identifying information controlling means of said called party.

15. A visual communication performing method for communicating between a first calling party and a called party connected through a first channel, comprising the steps of:

transmitting, from the first calling party to the called party through the first channel, a piece of particular identifying information of a second channel differing from the first channel;

transmitting to the called party through the second channel a call from the first calling party including the piece of particular identifying information or a call from a second calling party including a piece of general identifying information;

judging whether or not received identifying information of the call transmitted to the called party through the second channel agrees with the piece of particular identifying information transmitted from the first calling party through the first channel;

releasing the second channel to disconnect the second channel between the called party and the second calling party in cases where the received identifying information does not agree with the piece of particular identifying information;

establishing the call by connecting the second channel between the called party and the first calling party in cases where the received identifying information agrees with the piece of particular identifying information; and

transmitting one or more pieces of visual information from the first calling party to the called party to perform a visual communication between the first calling party and the called party through the first and second channels in cases where the call is established.