Method and apparatus for transmitting and receiving encoded data

• US 5,331,431 A
• Filed: 08/31/1992
• Issued: 07/19/1994
• Est. Priority Date: 08/31/1992
• Status: Expired due to Term

• Current Assignee: Motorola Mobility, Inc. (Lenovo Group Ltd.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Jasinski, Leon
• Primary Examiner(s): Coles, Sr., Edward L.
• Assistant Examiner(s): LEE, TOMMY D
• Application Number:
  US07/937,085
• Time in Patent Office: 687 Days
• Field of Search: 358/462, 358/400, 358/467, 358/448, 358/401, 358/443, 358/447, 358/453, 382/47, 382/54, 382/57, 379/56, 379/58, 379/61, 379/100
• US Class Current: 358/462
• CPC Class Codes: G06V 10/98 Detection or correction of errors, e.g. by rescanning the pattern or by human intervention; Evaluation of the quality of the acquired patterns
• CPC Class Codes: G06V 30/226 of cursive writing
• CPC Class Codes: H04N 1/00281 with a telecommunication apparatus, e.g. a switched network of teleprinters for the distribution of text-based information, a selective call terminal details of transmission H04N1/00095; establishing a communication with one of a facsimile machine or another apparatus sharing a single line H04N1/32704; interfacing cordless telephone terminals with an accessory to increase the functionality of user interface H04M1/72409
• CPC Class Codes: H04N 1/4115 involving the recognition of specific patterns, e.g. by symbol matching

Abstract

A method of transmitting and receiving encoded data generated from input data comprising readable text characters (102) in a communication system having an optical character recognition element (206) and a graphic encoding element (208), the communication system also having a transmitter (114) and a receiver (116), comprises accepting (602) the input data comprising the readable text characters (102) by a facsimile input (202). The method further comprises encoding (620, 622) as character code format data the readable text characters (102) received that are recognizable by the optical character recognition element (206), and encoding (610, 612, 614) as graphic code format data the readable text characters (102) received that are not recognizable by the optical character recognition element (206). The method further comprises assembling (632) the character code format data and the graphic code format data into an output data stream, the output data stream including information that describes original sizes and positions relative to one another of the readable text characters (102).

Claims

1. A method of transmitting and receiving encoded data derived from input data generated by a user, the input data comprising substantially readable text characters in a radio paging system comprising an optical character recognition element and a graphic encoding element, the radio paging system further comprising a radio transmitter and a selective call radio receiver, the method comprising the steps of:

(a) accepting the input data comprising the substantially readable text characters at an input of the radio paging system;

(b) encoding as character code format data the substantially readable text characters received in step (a) that are recognizable by the optical character recognition element;

(c) encoding as graphic code format data the substantially readable text characters received in step (a) that are not recognizable by the optical character recognition element;

(d) assembling the character code format data encoded in step (b) and the graphic code format data encoded in step (c) into an output data stream, the output data stream including information that describes original sizes and positions relative to one another of the substantially readable text characters;

(e) transmitting an address assigned to the selective call radio receiver, along with the output data stream assembled in step (d) in a radio signal from the radio transmitter;

(f) receiving by the selective call radio receiver the address and the output data stream transmitted in step (e); and

(g) converting within the selective call radio receiver the output data stream received in step (f) into substantially readable text characters.

2. The method in accordance with claim 1, wherein step (a) comprises the step of:

(h) receiving the input data in a format defined by a standard facsimile transmission protocol.

3. The method in accordance with claim 1, wherein step (b) comprises the step of:

(i) adding size information to complete the character code format data.

4. The method in accordance with claim 1, wherein step (c) comprises the steps of:

(j) determining the boundaries of the substantially readable text characters that are defined as not recognizable by the optical character recognition element;

(k) scanning within the boundaries determined in step (j) to form graphic images of the substantially readable text characters;

(l) performing data compression on the graphic images scanned in step (k) to partially form the graphic code format data; and

(m) adding size and location information to complete the graphic code format data.

5. The method in accordance with claim 1, wherein step (a) comprises the steps of:

(n) receiving information specially identifying a portion of the input data that is not intended by the user to be encoded as character code format data, even though the specially identified portion of the input data comprises characters that are recognizable by the optical character recognition element; and

(o) defining the specially identified portion of the input data to be ineligible for encoding as character code format data, thereby forcing the specially identified portion to be encoded as graphic code format data in step (c).

6. The method in accordance with claim 1, wherein step (g) comprises the steps of:

(p) generating characters in response to character code format data received in the output data stream;

(q) scaling the characters generated in step (p) in accordance with scale information received with the character code format data;

(r) generating graphic images in response to graphic code format data received in the output data stream;

(s) sizing the graphic images generated in step (r) in accordance with size information received with the graphic code format data; and

(t) substantially preserving the original positions relative to one another of the substantially readable text characters thus generated by conversion of the output data stream.

7. An apparatus in a radio paging system which transmits and receives by radio signals encoded data derived from input data generated by a user, the input data comprising substantially readable text characters, the apparatus comprising in a radio paging system controller:

input means for accepting the input data;

memory means coupled to a processor means for storing encoded data generated by an optical character recognition means and a graphic encoding means;

radio transmitter controller means coupled to the processor means for controlling radio transmissions of the encoded data; and

the processor means coupled to the input means for processing the input data, wherein the processor means comprises;

the optical character recognition means for encoding a first portion of the substantially readable text characters of the input data into character code format data, wherein the first portion comprises characters that are recognizable by the optical character recognition means and that have not been specially identified by the user as ineligible for encoding as character code format data;

the graphic encoding means for encoding a second portion of the substantially readable text characters of the input data into graphic code format data, wherein the second portion comprises characters that are not recognizable by the optical character recognition means and characters that have been specially identified by the user as ineligible for encoding as character code format data, even though the specially identified characters may be recognizable by the optical character recognition means; and

position description means for describing original positions relative to one another of the substantially readable text characters.

8. The apparatus in accordance with claim 8, further comprising in a selective call radio receiver:

an antenna for intercepting the radio transmissions;

radio receiver means coupled to the antenna for receiving the radio transmissions and decoding the encoded data;

conversion means coupled to the radio receiver means for converting the encoded data into displayable text characters and graphic images; and

display means coupled to the conversion means for displaying the displayable text characters and graphic images in a substantially readable presentation.

9. The apparatus in accordance with claim 8, wherein the conversion means comprises:

character generation means;

scaling means coupled to the character generation means for scaling characters generated by the character generation means;

graphic image generation means coupled to the character generation means for generating graphic images;

sizing means coupled to the graphic image generation means for sizing graphic images generated by the graphic image generation means; and

positioning means coupled to the scaling means and to the sizing means for substantially preserving the original positions relative to one another of the substantially readable text characters in response to received position description information.

10. The apparatus in accordance with claim 8, wherein the input means comprises a facsimile receiver compatible with a standard facsimile transmission protocol.

11. The apparatus in accordance with claim 8, wherein the optical character recognition means comprises scale specification means for specifying scale of ones of the substantially readable text characters of the first portion of the input data.

12. The apparatus in accordance with claim 8, wherein the graphic encoding means comprises:

boundary determination means for determining boundaries of ones of the second portion of the substantially readable text characters of the input data;

scanning means coupled to the boundary determination means for scanning within the boundaries determined to form graphic images of the substantially readable text characters;

data compression means coupled to the scanning means for performing data compression on the graphic images scanned to produce compressed graphic images; and

size specification means coupled to the data compression means for adding size information to the compressed graphic images.

13. A communications controller in a radio paging system which transmits and receives by radio signals encoded data derived from input data generated by a user, the input data comprising substantially readable text characters, the communications controller comprising:

an input receiver for accepting the input data;

a memory coupled to a processor for storing encoded data generated by an optical character recognition element and a graphic encoding element;

a radio transmitter controller coupled to the processor for controlling radio transmissions of the encoded data; and

the processor coupled to the input receiver for processing the input data, wherein the processor comprises;

the optical character recognition element for encoding a first portion of the substantially readable text characters of the input data into character code format data, wherein the first portion comprises characters that are recognizable by the optical character recognition element and that have not been specially identified by the user as ineligible for encoding as character code format data;

the graphic encoding element for encoding a second portion of the substantially readable text characters of the input data into graphic code format data, wherein the second portion comprises characters that are not recognizable by the optical character recognition element and characters that have been specially identified by the user as ineligible for encoding as character code format data, even though the specially identified characters may be recognizable by the optical character recognition element; and

position description means for describing original positions relative to one another of the substantially readable text characters.

14. The communications controller in accordance with claim 13, wherein the input receiver comprises a facsimile receiver compatible with a standard facsimile transmission protocol.

15. The communications controller in accordance with claim 13, wherein the optical character recognition element comprises scale specification means for specifying scale of ones of the substantially readable text characters of the first portion of the input data.

16. The communications controller in accordance with claim 14, wherein the graphic encoding element comprises:

boundary determination means for determining boundaries of ones of the second portion of the substantially readable text characters of the input data;

scanning means coupled to the boundary determination means for scanning within the boundaries determined to form graphic images of the substantially readable text characters;

data compression means coupled to the scanning means for performing data compression on the graphic images scanned to produce compressed graphic images; and

size specification means coupled to the data compression means for adding size information to the compressed graphic images.

17. A selective call receiver for use in a communication system that transmits and receives by radio signals encoded data derived from input data generated by a user, the input data comprising substantially readable text characters having original scales and positions relative to one another, the selective call receiver comprising:

an antenna for intercepting the radio signals;

radio receiver means coupled to the antenna for receiving the radio signals comprising an address and the encoded data;

a selective call address decoder coupled to the radio receiver for decoding the address;

a processor coupled to the selective call address decoder for processing the encoded data,

wherein the processor processes the encoded data in response to the decoded address being a facsimile address assigned to the selective call receiver, and

wherein the processor does not process the encoded data in response to the decoded address not being a facsimile address assigned to the selective call receiver;

a conversion element coupled to the receiver for converting the encoded data into locally generated text characters and graphic images of text characters, the conversion element comprising;

a sizing element for sizing the graphic images of text characters relative to the locally generated text characters to substantially reproduce the original scales of the substantially readable text characters relative to one another; and

a positioning element coupled to the sizing element for positioning the graphic images of text characters relative to the locally generated text characters to substantially reproduce the original positions of the substantially readable text characters relative to one another; and

a display coupled to the conversion element for displaying the displayable text characters and graphic images.

18. The selective call receiver in accordance with claim 17, wherein the conversion element further comprises:

a character generator for generating the locally generated text characters;

a scaler coupled to the character generator for scaling the locally generated text characters; and

a graphic image generator coupled to the character generator for generating the graphic images of text characters.